Components contributing guide: Fix relative links

packages/components/CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 Thank you for taking the time to contribute.
 
-The following is a set of guidelines for contributing to the `@wordpress/components` package to be considered in addition to the general ones described in our [Contributing Policy](/CONTRIBUTING.md).
+The following is a set of guidelines for contributing to the `@wordpress/components` package to be considered in addition to the general ones described in our [Contributing Policy](https://github.com/WordPress/gutenberg/blob/HEAD/CONTRIBUTING.md).
 
 This set of guidelines should apply especially to newly introduced components. In fact, while these guidelines should also be retroactively applied to existing components, it is sometimes impossible to do so for legacy/compatibility reasons.
 
@@ -36,7 +36,7 @@ To determine if a component should be added, ask yourself:
 
 Here’s a flowchart that can help determine if a new component is necessary:
 
-[![New component flowchart](https://wordpress.org/gutenberg/files/2019/07/New_component_flowchart.png)](https://coggle.it/diagram/WtUSrld3uAYZHsn-/t/new-ui-component/992b38cbe685d897b4aec6d0dd93cc4b47c06e0d4484eeb0d7d9a47fb2c48d94)
+![New component flowchart](https://wordpress.org/gutenberg/files/2019/07/New_component_flowchart.png)
 
 ### First steps
 
@@ -95,12 +95,12 @@ In these situations, one possible approach is to "soft-deprecate" a given legacy
 2. Updating all places in Gutenberg that use that API.
 3. Adding deprecation warnings (only after the previous point is completed, otherwise the Browser Console will be polluted by all those warnings and some e2e tests may fail).
 
-When adding new components or new props to existing components, it's recommended to create a [private version](/packages/private-apis/README.md)) of the component until the changes are stable enough to be exposed as part of the public API.
+When adding new components or new props to existing components, it's recommended to create a [private version](https://developer.wordpress.org/block-editor/reference-guides/packages/packages-private-apis/) of the component until the changes are stable enough to be exposed as part of the public API.
 
 ### Learn more
 
--   [How to preserve backward compatibility for a React Component](/docs/contributors/code/backward-compatibility.md#how-to-preserve-backward-compatibility-for-a-react-component)
--   [Experimental and Unstable APIs](/docs/contributors/code/coding-guidelines.md#legacy-experimental-apis-plugin-only-apis-and-private-apis)
+-   [How to preserve backward compatibility for a React Component](https://developer.wordpress.org/block-editor/contributors/code/backward-compatibility/#how-to-preserve-backward-compatibility-for-a-react-component)
+-   [Experimental and Unstable APIs](https://developer.wordpress.org/block-editor/contributors/code/coding-guidelines/#legacy-experimental-apis-plugin-only-apis-and-private-apis)
 -   [Deprecating styles](#deprecating-styles)
 
 <!-- ## Polymorphic Components (i.e. the `as` prop)
@@ -216,8 +216,8 @@ function Example(
 
 A couple of good examples of how hooks are used for composition are:
 
--   the `Card` component, which builds on top of the `Surface` component by [calling the `useSurface` hook inside its own hook](/packages/components/src/card/card/hook.ts);
--   the `HStack` component, which builds on top of the `Flex` component and [calls the `useFlex` hook inside its own hook](/packages/components/src/h-stack/hook.tsx).
+-   the `Card` component, which builds on top of the `Surface` component by [calling the `useSurface` hook inside its own hook](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/card/card/hook.ts);
+-   the `HStack` component, which builds on top of the `Flex` component and [calls the `useFlex` hook inside its own hook](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/h-stack/hook.tsx).
 
 <!-- ## API Consinstency
 
@@ -418,7 +418,7 @@ On the component's main named export, add a JSDoc comment that includes the main
 
 All new component should be styled using [Emotion](https://emotion.sh/docs/introduction).
 
-Note: Instead of using Emotion's standard `cx` function, the custom [`useCx` hook](/packages/components/src/utils/hooks/use-cx.ts) should be used instead.
+Note: Instead of using Emotion's standard `cx` function, the custom [`useCx` hook](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/utils/hooks/use-cx.ts) should be used instead.
 
 ### Deprecating styles
 
@@ -462,7 +462,7 @@ export const Wrapper = styled.div`
 
 Once deprecated, code examples in docs/stories should include the opt-in prop set to `true` so that new consumers are encouraged to adopt it from the start.
 
-Remember to [add a **Needs Dev Note** label](/docs/contributors/code/backward-compatibility.md##dev-notes) to the pull request so third-party developers can be informed of the deprecation.
+Remember to [add a **Needs Dev Note** label](https://developer.wordpress.org/block-editor/contributors/code/backward-compatibility/#dev-notes) to the pull request so third-party developers can be informed of the deprecation.
 
 When the grace period is over and the deprecation version arrives, the `__next*` prop, deprecation notice, and deprecated styles should all be completely removed from the codebase.
 
@@ -491,7 +491,7 @@ Components can use this system via a couple of functions:
 -   they can connect to the Context via `contextConnect`
 -   they can read the "computed" values from the context via `useContextSystem`
 
-An example of how this is used can be found in the [`Card` component family](/packages/components/src/card). For example, this is how the `Card` component injects the `size` and `isBorderless` props down to its `CardBody` subcomponent — which makes it use the correct spacing and border settings "auto-magically".
+An example of how this is used can be found in the [`Card` component family](https://github.com/WordPress/gutenberg/tree/trunk/packages/components/src/card). For example, this is how the `Card` component injects the `size` and `isBorderless` props down to its `CardBody` subcomponent — which makes it use the correct spacing and border settings "auto-magically".
 
 ```jsx
 //=========================================================================
@@ -564,7 +564,7 @@ export function useCardBody( props ) {
 
 ## Unit tests
 
-Please refer to the [JavaScript Testing Overview docs](/docs/contributors/code/testing-overview.md#snapshot-testing).
+Please refer to the [JavaScript Testing Overview docs](https://developer.wordpress.org/block-editor/contributors/code/testing-overview/#snapshot-testing).
 
 ## Storybook
 
@@ -596,13 +596,13 @@ Primary.args = {
 
 A great tool to use when writing stories is the [Storybook Controls addon](https://storybook.js.org/addons/@storybook/addon-controls). Ideally props should be exposed by using this addon, which provides a graphical UI to interact dynamically with the component without needing to write code. Historically, we used [Knobs](https://storybook.js.org/addons/@storybook/addon-knobs), but it was deprecated and later removed in [#47152](https://github.com/WordPress/gutenberg/pull/47152).
 
-The default value of each control should coincide with the default value of the props (i.e. it should be `undefined` if a prop is not required). A story should, therefore, also explicitly show how values from the Context System are applied to (sub)components. A good example of how this may look like is the [`Card` story](https://wordpress.github.io/gutenberg/?path=/story/components-card--default) (code [here](/packages/components/src/card/stories/index.tsx)).
+The default value of each control should coincide with the default value of the props (i.e. it should be `undefined` if a prop is not required). A story should, therefore, also explicitly show how values from the Context System are applied to (sub)components. A good example of how this may look like is the [`Card` story](https://wordpress.github.io/gutenberg/?path=/story/components-card--default) (code [here](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/card/stories/index.story.tsx)).
 
 Storybook can be started on a local machine by running `npm run storybook:dev`. Alternatively, the components' catalogue (up to date with the latest code on `trunk`) can be found at [wordpress.github.io/gutenberg/](https://wordpress.github.io/gutenberg/).
 
 ## Documentation
 
-All components, in addition to being typed, should be using JSDoc when necessary — as explained in the [Coding Guidelines](/docs/contributors/code/coding-guidelines.md#javascript-documentation-using-jsdoc).
+All components, in addition to being typed, should be using JSDoc when necessary — as explained in the [Coding Guidelines](https://developer.wordpress.org/block-editor/contributors/code/coding-guidelines/#javascript-documentation-using-jsdoc).
 
 Each component that is exported from the `@wordpress/components` package should include a `README.md` file, explaining how to use the component, showing examples, and documenting all the props.
 
@@ -625,7 +625,7 @@ Description of the component.
 
 ## Usage
 
-Code example using correct markdown syntax and formatted using project's formatting rules. See [ItemGroup](/packages/components/src/item-group/item-group/README.md#usage) for a real-world example.
+Code example using correct markdown syntax and formatted using project's formatting rules. See [ItemGroup](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/item-group/item-group/README.md) for a real-world example.
 
 ```jsx
 import { ExampleComponent } from '@wordpress/components';
@@ -653,13 +653,13 @@ Prop description. With a new line before and after the description and before an
 
 ### Inherited props
 
-Add this section when there are props that are drilled down into an internal component. See [ClipboardButton](/packages/components/src/clipboard-button/README.md) for an example.
+Add this section when there are props that are drilled down into an internal component. See [ClipboardButton](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/clipboard-button/README.md) for an example.
 
 <!-- Only add the next section if the component relies on the [Context System](#context-system) -->
 
 ## Context
 
-See examples for this section for the [ItemGroup](/packages/components/src/item-group/item-group/README.md#context) and [`Card`](/packages/components/src/card/card/README.md#context) components.
+See examples for this section for the [ItemGroup](https://github.com/WordPress/gutenberg/blob/trunk/packages/components/src/item-group/item-group/README.md#context) and [`Card`](https://github.com/WordPress/gutenberg/tree/trunk/packages/components/src/card/card#context) components.
 ````
 
 ## Folder structure