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>

conntest.php

@@ -1,5 +1,26 @@
 <?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/>.
+
+/**
+ * Standalone Adobe Connect connection test page.
+ *
+ * @package    mod_meetletacbfree
+ * @copyright  2026 MeetLet <info@meetlet.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 
 require_once('../../config.php');
 
@@ -15,7 +36,6 @@ $PAGE->set_context(context_system::instance());
 $PAGE->set_url(new moodle_url('/mod/meetletacbfree/conntest.php'));
 $PAGE->set_title(get_string('conntesttitle', 'meetletacbfree'));
 $PAGE->set_pagelayout('admin');
-$PAGE->requires->css(new moodle_url('/mod/meetletacbfree/styles.css', ['v' => '2026081415']));
 
 $results = [];
 $push = static function(string $label, bool $ok, string $detail = '') use (&$results): void {