feat(menu): list regions and cities in the header menu

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

viator-collector/includes/class-vc-plugin.php

@@ -21,6 +21,7 @@ final class VC_Plugin {
 		VC_Settings::init();
 		VC_Structure_Admin::init();
 		VC_Routing::init();
+		VC_Menu::init();
 		VC_Cron::init();
 		VC_Display::init();
 		VC_Sections::init();
@@ -39,6 +40,7 @@ final class VC_Plugin {
 			'includes/class-vc-settings.php',
 			'includes/class-vc-structure-admin.php',
 			'includes/class-vc-routing.php',
+			'includes/class-vc-menu.php',
 			'includes/class-vc-display.php',
 			'includes/class-vc-sections.php',
 		);