feat(task-management): enhance task details and subtask handling

- Added subtask-related properties to the Task interface for better management of subtasks.
- Implemented functionality to show and add subtasks directly within the task list, improving user interaction.
- Updated task rendering logic to accommodate new subtask features, enhancing overall task management experience.
- Removed unused components and optimized imports across various task management files for cleaner code.

worklenz-frontend/src/components/task-management/optimized-bulk-action-bar.tsx

@@ -540,7 +540,6 @@ OptimizedBulkActionBarContent.displayName = 'OptimizedBulkActionBarContent';
 
 // Portal wrapper for performance isolation
 const OptimizedBulkActionBar: React.FC<OptimizedBulkActionBarProps> = React.memo((props) => {
-  console.log('BulkActionBar totalSelected:', props.totalSelected, typeof props.totalSelected);
   if (!props.totalSelected || Number(props.totalSelected) < 1) {
     return null;
   }