fix(twitchPlugin): Add GitHub CDN fallback for tmi.js

Enhance reliability of tmi.js loading within the `webonlymode` Twitch plugin.

- Adds `https://cdn.jsdelivr.net/gh/tmijs/tmi.js@1.8.5/dist/tmi.min.js` as an alternative source.
- This new source utilizes GitHub's CDN, which is more resilient to potential issues where npm mirror CDNs (e.g., `jsdelivr.net/npm`, `unpkg.com`) might drop or fail to serve the built browser bundle.
- Part of ongoing work to improve the robustness and testing of web-only features on the `beta` branch.

[auto-enhanced]

Author: steveseguin

webonlymode/plugins/twitchPlugin.js

@@ -18,6 +18,8 @@ const TWITCH_SCOPES = [
 ];
 
 const TMI_SOURCES = [
+  // GitHub CDN keeps the built browser bundle even when npm mirrors drop dist/
+  'https://cdn.jsdelivr.net/gh/tmijs/tmi.js@1.8.5/dist/tmi.min.js',
   'https://cdn.jsdelivr.net/npm/tmi.js@1.8.5/dist/tmi.min.js',
   'https://unpkg.com/tmi.js@1.8.5/dist/tmi.min.js'
 ];