Address Moodle Marketplace review for mod_meetletacbfree 1.1.3.

Migrate legacy ajax/JS to external services and AMD, enable TLS verification, scope admin CSS with RTLCSS-safe rules, and fix README/lang/boilerplate gaps.

Co-authored-by: Cursor <cursoragent@cursor.com>

classes/registration/registration_exception.php

@@ -1,11 +1,24 @@
 <?php
 // This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
  * Structured registration API / local client exception.
  *
  * @package    mod_meetletacbfree
- * @copyright  2026 MeetLet
+ * @copyright  2026 MeetLet <info@meetlet.net>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */