Implement site structure synchronization between WordPress and IGNY8 backend

- Added a new API endpoint in the `IntegrationViewSet` to update the WordPress site structure, including post types and taxonomies.
- Implemented a function to retrieve the site structure and sync it to the IGNY8 backend after establishing a connection.
- Scheduled a daily cron job to keep the site structure updated.
- Enhanced the WordPress plugin to trigger synchronization upon successful API connection.
- Updated relevant files to support the new synchronization feature, improving integration capabilities.

igny8-wp-plugin/sync/hooks.php

@@ -34,6 +34,7 @@ function igny8_register_sync_hooks() {
     add_action('igny8_sync_taxonomies', 'igny8_cron_sync_taxonomies');
     add_action('igny8_sync_keywords', 'igny8_cron_sync_keywords');
     add_action('igny8_full_site_scan', 'igny8_cron_full_site_scan');
+    add_action('igny8_sync_site_structure', 'igny8_sync_site_structure_to_backend');
 }
 
 // Register hooks