Add caching to the auto_loader for interfaces (#7320)

* update auto loader to load and cache interfaces

* use new method to update the auto loader cache

* use new interface

* use new interface to trigger a cache flush

* update the console upgrade menu

* update the missing implements syntax

* add the clear_cache to the flush cache button

resources/interfaces/clear_cache.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * FusionPBX
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is FusionPBX
+ *
+ * The Initial Developer of the Original Code is
+ * Mark J Crane <markjcrane@fusionpbx.com>
+ * Portions created by the Initial Developer are Copyright (C) 2008-2025
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Mark J Crane <markjcrane@fusionpbx.com>
+ * Tim Fry <tim@fusionpbx.com>
+ */
+
+/**
+ * Any class that implements the clear_cache interface will automatically be called when the cache button is pressed
+ * @author Tim Fry <tim@fusionpbx.com>
+ */
+interface clear_cache {
+	/**
+	 * The clear_cache method is called automatically for any class that implements the clear_cache interface.
+	 * The function declared here ensures that all clear_cache methods have the same number of parameters being passed, which in this case, is no parameters.
+	 */
+	public static function clear_cache();
+}