feat(backend): Added endpoint to fetch HTML version of learning object (from Dwengo backend)

Also refactored a bit to make this easier.

backend/src/routes/learningObjects.ts

@@ -1,27 +0,0 @@
-import express from 'express';
-import {
-    getAllLearningObjects,
-    getLearningObject,
-} from '../controllers/learningObjects.js';
-
-const router = express.Router();
-
-// DWENGO learning objects
-
-// Queries: hruid(path), full, language
-// Route to fetch list of learning objects based on hruid of learning path
-
-// Route 1: list of object hruids
-// Example 1: http://localhost:3000/learningObject?hruid=un_artificiele_intelligentie
-
-// Route 2: list of object data
-// Example 2: http://localhost:3000/learningObject?full=true&hruid=un_artificiele_intelligentie
-router.get('/', getAllLearningObjects);
-
-// Parameter: hruid of learning object
-// Query: language
-// Route to fetch data of one learning object based on its hruid
-// Example: http://localhost:3000/learningObject/un_ai7
-router.get('/:hruid', getLearningObject);
-
-export default router;