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/learning-paths.ts

@@ -0,0 +1,27 @@
+import express from 'express';
+import { getLearningPaths } from '../controllers/learning-paths.js';
+
+const router = express.Router();
+
+// DWENGO learning paths
+
+// Route 1: no query
+// Fetch all learning paths
+// Example 1: http://localhost:3000/learningPath
+
+// Unified route for fetching learning paths
+// Route 2: Query: hruid (list), language
+// Fetch learning paths based on hruid list
+// Example 2: http://localhost:3000/learningPath?hruid=pn_werking&hruid=art1
+
+// Query: search, language
+// Route to fetch learning paths based on a searchterm
+// Example 3: http://localhost:3000/learningPath?search=robot
+
+// Query: theme, anguage
+// Route to fetch learning paths based on a theme
+// Example: http://localhost:3000/learningPath?theme=kiks
+
+router.get('/', getLearningPaths);
+
+export default router;