feat: Add YouTube video support and update admin templates

- Introduced a new YouTube tech integration in `youtube.min.js` for enhanced video playback.
- Created new admin template files for managing video settings, including `index.php` and `steasyvideo-pro.tpl`.
- Updated hook templates (`device_mode.tpl`, `forquickview.tpl`, `header.tpl`, `miniature.tpl`, `miniature_tb.tpl`, and predefined templates) to include video functionality.
- Implemented caching headers in several PHP files to improve performance.
- Ensured all new templates include proper licensing information and copyright notices.

modules/steasyvideo/.htaccess

@@ -0,0 +1,12 @@
+<IfModule !mod_rewrite.c>
+  # Apache 2.2
+  <IfModule !mod_authz_core.c>
+      Order deny,allow
+      Deny from all
+  </IfModule>
+
+  # Apache 2.4
+  <IfModule mod_authz_core.c>
+      Require all denied
+  </IfModule>
+</IfModule>