[nextjs-xmcloud][sitecore-jss-nextjs] Component Library endpoint

[art-alexeyenko]

• This PR follows the Contribution Guide
• Changelog updated
• Upgrade guide entry added

Description / Motivation

Extends api/editing/render endpoint with Component Library functionality - so that a single component can be rendered and experimented with.

The implementation has two main parts:

• REST Component service - retrieves component data for a component with uid, item id and other inputs
• ComponentLibraryLayout component - renders the component, sends out the component:ready event and handles component updates from component:update event.

Some parts of the logic are prepared to be reused for other frameworks.

Please don't merge until release prep for 22.3 begins.

Testing Details

• Unit Test Added
• Manual Test/Other (Please elaborate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[stasmaxymov]

PR is missing a part with component update listener