feat(task-filters): enhance localization and UI for task filters

- Added new translation keys for task filter functionalities across multiple languages, improving user experience and accessibility.
- Updated the ImprovedTaskFilters component to utilize localized strings for search placeholders, loading states, and filter messages.
- Enhanced styling for filter buttons and dropdowns to ensure consistency in both light and dark modes.
- Introduced a description column in task management components, improving the display of task details.

worklenz-frontend/src/components/task-list-v2/SubtaskLoadingSkeleton.tsx

@@ -32,6 +32,12 @@ const SubtaskLoadingSkeleton: React.FC<SubtaskLoadingSkeletonProps> = ({ visible
             <div className="h-4 w-32 bg-gray-200 dark:bg-gray-700 rounded animate-pulse" />
           </div>
         );
+      case 'description':
+        return (
+          <div style={baseStyle} className="flex items-center px-2">
+            <div className="h-4 w-40 bg-gray-200 dark:bg-gray-700 rounded animate-pulse" />
+          </div>
+        );
       case 'status':
         return (
           <div style={baseStyle} className="flex items-center">