feat: Implement get payment plans API endpoint

packages/backend/src/routes/api/v1/payment.ee.js

@@ -0,0 +1,10 @@
+import { Router } from 'express';
+import { authenticateUser } from '../../../helpers/authentication.js';
+import checkIsCloud from '../../../helpers/check-is-cloud.js';
+import getPlansAction from '../../../controllers/api/v1/payment/get-plans.ee.js';
+
+const router = Router();
+
+router.get('/plans', authenticateUser, checkIsCloud, getPlansAction);
+
+export default router;