[core-data] Document and add types for dynamic actions and selectors.

[manzoorwanijk]

Fixes #56287
Related #67142

What?

Define the type declarations for dynamic selectors and actions for core-data package`

Why?

The dynamic selectors cause errors when used in TypeScript because TS can't find those defined anywhere.

How?

The PR creates TS definition declarations for all the dynamic selectors and some useful actions

Testing Instructions

• Use the dynamic selectors or actions in TypeScript files
• Confirm that TS doesn't show an error

Example

import { store as coreStore } from '@wordpress/core-data';
import { select } from '@wordpress/data';

const { getUser, getUsers } = select( coreStore );

Testing Instructions for Keyboard

Screenshots or screencast

We will now have auto-completions for entity selectors

[github-actions]

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Co-authored-by: manzoorwanijk <[email protected]>
Co-authored-by: sirreal <[email protected]>

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[manzoorwanijk]

The description of these fields is copied from core REST API schema.

[gziolo]

Moved to #67668.