Fix CSS and JavaScript formatting issues

- Updated stylelint configuration to fix CSS formatting issues
- Updated ESLint configuration to fix JavaScript issues
- Added global variables to ESLint configuration

assets/js/admin.js

@@ -3,10 +3,10 @@
  */
 
 (function($) {
-    'use strict';
+  'use strict';
 
-    $(document).ready(function() {
-        // Plugin admin functionality will go here
-    });
+  $(document).ready(function() {
+    // Plugin admin functionality will go here
+  });
 
 })(jQuery);