Docs: Add details on installing/using packages

docs/designers-developers/developers/packages.md

@@ -2,8 +2,39 @@
 
 Gutenberg exposes a list of JavaScript packages and tools for WordPress development.
 
-## Using the packages
+## Using the packages via WordPress global
 
 JavaScript packages are available as a registered script in WordPress and can be accessed using the `wp` global variable.
 
+If you wanted to use the `PlainText` component from the editor module, first you would specify `wp-editor` as a dependency when you enqueue your script:
+
+```php
+wp_enqueue_script(
+ 'my-custom-block',
+ plugins_url( $block_path, __FILE__ ),
+ array( 'wp-blocks', 'wp-editor', 'wp-element', 'wp-i18n' )
+);
+```
+
+After the dependency is declared, you can access the module in your JavaScript code using the global `wp` like so:
+```js
+const { PlainText } = wp.editor;
+
+```
+
+## Using the packages via npm
+
 All the packages are also available on [npm](https://www.npmjs.com/org/wordpress) if you want to bundle them in your code.
+
+Using the same `PlainText` example, you would install the editor module with npm:
+
+```bash
+npm install @wordpress/editor --save
+```
+
+Once installed, you can access the component in your code using:
+
+```js
+import { PlainText } from '@wordpress/editor';
+```
+