Method: Filter main questions query args. Modify and add category args.
Method: Subscriber action ID.
Method: Filter ask button link to append current category link.
Method: Filter canonical URL when in category page.
Method: Register Categories options.
Method: Enqueue required script
Method: Load admin assets in categories page.
Method: Add category menu in wp-admin.
Method: Append meta display.
Method: Enqueue scripts.
