Method: Render shortcode `[apcode]`.
Method: Initialize the plugin by setting localization and loading public scripts and styles.
Method: Register Categories options
Method: Add captcha field in question and answer form.
Method: Add category pages rewrite rule.
Method: Filter main questions query args. Modify and add tags args.
Method: Add tags sorting in list filters
Method: Ajax callback for loading order by filter.
Method: Ajax callback for loading order by filter for tags.
Method: Output active tag in filter
