Refactor plugin structure:

- Rename pro-plugins-config.php to data/pro-plugins.php
- Rename recommended-plugins.php to free-plugins.php
- Rename class-recommended-plugins-manager.php to class-free-plugins-manager.php
- Update all references throughout the codebase
- Add enhanced hover effects to Go Pro buttons

.gitignore

@@ -38,7 +38,7 @@ $RECYCLE.BIN/
 .git_status_temp.txt
 project-documents/
 reference-plugins/
-*.bak
+*.bak*
 node_modules/
 composer.lock
 package-lock.json