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>

README.md

@@ -1,7 +1,7 @@
 # MeetLet Adobe Connect Bridge — Marketplace Edition
 
 **Component:** `mod_meetletacbfree`  
-**Release:** 1.0.9-marketplace  
+**Release:** 1.1.3  
 **License:** [GNU GPL v3 or later](COPYING.txt)
 
 Connect Moodle to Adobe Connect for live classes, single sign-on (SSO), recordings, and shared meeting content — without a separate Windows agent or commercial license.
@@ -34,7 +34,7 @@ This edition is free to install and use. It includes the core classroom workflow
 | **Activity defaults** | Site-wide meeting language, wait-for-host, and tab visibility with per-activity overrides |
 | **Backup & restore** | Standard Moodle 2 backup API support for course copies and restores |
 | **Privacy API** | GDPR-ready privacy provider for exported and deleted user data |
-| **Optional site registration** | Transparent opt-in registration with MeetLet for update notices and support statistics (plugin works fully without it) |
+| **Plugin activation** | Voluntary administrator action with MeetLet; required to unlock meeting features (SSO join, recordings, content, and related tools) |
 
 ---