Update content categorization and handle hierarchical documentation

Enhancements were implemented to support hierarchical documentation. Local CMS now respects parent ID and order attributes of content items, and content can be categories as 'blog' or 'documentation'. Changes were also made to the wordpress integration supporting these new categorizations. Introduced working with nested documentation pages.

packages/cms/wordpress/README.md

@@ -41,4 +41,23 @@ You will be asked to set up the Wordpress instance when you visit `http://localh
 
 ## Note for Wordpress REST API
 
-To make the REST API in your Wordpress instance work, please change the permalink structure to `/%post%/` from the Wordpress admin panel.
+To make the REST API in your Wordpress instance work, please change the permalink structure to `/%post%/` from the Wordpress admin panel.
+
+## Blog
+
+To include Blog Posts from Wordpress - please create a **post** with category named `blog` and add posts to it.
+
+## Documentation
+
+To include Documentation from Wordpress - please create a **page** with category named `documentation` and add posts to it.
+
+This involves enabling categories for pages. To do this, add the following code to your theme's `functions.php` file:
+
+```php
+function add_categories_to_pages() {
+    register_taxonomy_for_object_type('category', 'page');
+}
+add_action('init', 'add_categories_to_pages');
+```
+
+Please refer to `wp-content/themes/twentytwentyfour/functions.php` for an example of a theme that includes this code.