feat: question route als subroute van learning objects

backend/src/routes/learning-objects.ts

@@ -5,6 +5,8 @@ import {
 } from '../controllers/learning-objects.js';
 
 import submissionRoutes from './submissions.js';
+import questionRoutes from './questions.js';
+
 
 const router = express.Router();
 
@@ -28,4 +30,6 @@ router.get('/:hruid', getLearningObject);
 
 router.use('/:hruid/submissions', submissionRoutes);
 
+router.use('/:hruid/:version/questions', questionRoutes)
+
 export default router;