refactor(task-list): update subtask and indicator visibility logic

- Modified subtask visibility conditions across TaskCard, EnhancedKanbanTaskCard, KanbanTaskCard, and TaskRow components to only display when the count is greater than 1.
- Enhanced task indicators for comments and attachments to follow the same visibility logic.
- Added new dependencies for task management types to support subscriber and attachment features.

worklenz-frontend/src/pages/projects/projectView/taskList/task-list-table/task-list-table-cells/task-list-task-cell/task-list-task-cell.tsx

@@ -110,7 +110,7 @@ const TaskListTaskCell = ({
   };
 
   const renderSubtasksCountLabel = (taskId: string, isSubTask: boolean, subTasksCount: number) => {
-    if (!taskId) return null;
+    if (!taskId || subTasksCount <= 1) return null;
     return (
       <Button
         onClick={() => handleToggleExpansion(taskId)}