Implement deleteGroupActivity endpoint and enhance addGroupActivity functionality

Added a new endpoint to delete group activities in the diaryDateActivityController and corresponding route in diaryDateActivityRoutes. Enhanced the addGroupActivity function to accept an optional timeblockId parameter, allowing for more precise activity management. Updated the DiaryView component to support the removal of group activities, improving user experience and functionality in activity management.

backend/routes/diaryDateActivityRoutes.js

@@ -6,6 +6,7 @@ import {
     updateDiaryDateActivityOrder,
     getDiaryDateActivities,
     addGroupActivity,
+    deleteGroupActivity,
 } from '../controllers/diaryDateActivityController.js';
 import { authenticate } from '../middleware/authMiddleware.js';
 
@@ -14,6 +15,7 @@ const router = express.Router();
 router.use(authenticate);
 
 router.post('/group', addGroupActivity);
+router.delete('/group/:clubId/:groupActivityId', deleteGroupActivity);
 router.post('/:clubId/', createDiaryDateActivity);
 router.put('/:clubId/:id/order', updateDiaryDateActivityOrder);
 router.put('/:clubId/:id', updateDiaryDateActivity);