feat(task-management): enhance Checkbox component and task selection functionality

- Added `indeterminate` state to Checkbox component for better visual representation of partial selections.
- Updated TaskGroup and VirtualizedTaskList components to utilize the new Checkbox features, allowing for group selection with indeterminate states.
- Implemented custom debounce function for saving task fields to localStorage, improving performance during user interactions.
- Enhanced task row styling for better visibility and user experience, particularly in dark mode.

worklenz-frontend/src/features/task-management/taskListFields.slice.ts

@@ -69,15 +69,12 @@ const taskListFieldsSlice = createSlice({
       const field = state.find(f => f.key === action.payload);
       if (field) {
         field.visible = !field.visible;
-        saveFields(state);
       }
     },
     setFields(state, action: PayloadAction<TaskListField[]>) {
-      saveFields(action.payload);
       return action.payload;
     },
     resetFields() {
-      saveFields(DEFAULT_FIELDS);
       return DEFAULT_FIELDS;
     },
   },