Docs: Improve wp-admin JSDoc structural data globally.

JSDoc takes it structural data from `@namespace`, `@lends` and `@memberOf`. This change fixes these tags for all JavaScript files in the wp-admin folder.

* Add jsdoc configuration to parse wp-admin/js files. Use `jsdoc -c jsdoc.conf.json` to generate JSDoc.
* Define all used namespaces using `@namespace`.
* Define each usage of the extend function as a prototype assignment using `@lends`.
* Add `@alias` if JSDoc cannot detect the correct name automatically.

This has previously been corrected for all `wp-includes` JavaScript files: [41351].

Props herregroen.
Fixes #42485.

Built from https://develop.svn.wordpress.org/trunk@42403


git-svn-id: http://core.svn.wordpress.org/trunk@42232 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/code-editor.js

@@ -1,7 +1,13 @@
 if ( 'undefined' === typeof window.wp ) {
+	/**
+	 * @namespace wp
+	 */
 	window.wp = {};
 }
 if ( 'undefined' === typeof window.wp.codeEditor ) {
+	/**
+	 * @namespace wp.codeEditor
+	 */
 	window.wp.codeEditor = {};
 }
 
@@ -33,6 +39,7 @@ if ( 'undefined' === typeof window.wp.codeEditor ) {
 	 * @param {object}     settings.codeMirror - Settings for CodeMirror.
 	 * @param {Function}   settings.onChangeLintingErrors - Callback for when there are changes to linting errors.
 	 * @param {Function}   settings.onUpdateErrorNotice - Callback to update error notice.
+	 *
 	 * @returns {void}
 	 */
 	function configureLinting( editor, settings ) { // eslint-disable-line complexity
@@ -202,6 +209,7 @@ if ( 'undefined' === typeof window.wp.codeEditor ) {
 	 * @param {object}     settings.codeMirror - Settings for CodeMirror.
 	 * @param {Function}   settings.onTabNext - Callback to handle tabbing to the next tabbable element.
 	 * @param {Function}   settings.onTabPrevious - Callback to handle tabbing to the previous tabbable element.
+	 *
 	 * @returns {void}
 	 */
 	function configureTabbing( codemirror, settings ) {
@@ -240,7 +248,7 @@ if ( 'undefined' === typeof window.wp.codeEditor ) {
 	}
 
 	/**
-	 * @typedef {object} CodeEditorInstance
+	 * @typedef {object} wp.codeEditor~CodeEditorInstance
 	 * @property {object} settings - The code editor settings.
 	 * @property {CodeMirror} codemirror - The CodeMirror instance.
 	 */
@@ -260,6 +268,7 @@ if ( 'undefined' === typeof window.wp.codeEditor ) {
 	 * @param {object}                [settings.csslint] - Rules for CSSLint.
 	 * @param {object}                [settings.htmlhint] - Rules for HTMLHint.
 	 * @param {object}                [settings.jshint] - Rules for JSHint.
+	 *
 	 * @returns {CodeEditorInstance} Instance.
 	 */
 	wp.codeEditor.initialize = function initialize( textarea, settings ) {