feat: add system plugin extension class

source/plg_system_mokosuitebooking/src/Extension/Booking.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * @copyright Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
+ * @license   GPL-3.0-or-later
+ */
+
+namespace Moko\Plugin\System\MokoSuiteBooking\Extension;
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\Event\DispatcherInterface;
+use Psr\Container\ContainerInterface;
+
+final class Booking extends CMSPlugin
+{
+    protected $autoloadLanguage = true;
+
+    public function boot(ContainerInterface $container): void
+    {
+    }
+}