feat: Implement get app API endpoint

packages/backend/src/routes/api/v1/apps.js

@@ -0,0 +1,10 @@
+import { Router } from 'express';
+import asyncHandler from 'express-async-handler';
+import { authenticateUser } from '../../../helpers/authentication.js';
+import getAppAction from '../../../controllers/api/v1/apps/get-app.js';
+
+const router = Router();
+
+router.get('/:appKey', authenticateUser, asyncHandler(getAppAction));
+
+export default router;