feat(api): add get flow endpoint

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

@@ -0,0 +1,8 @@
+import { Router } from 'express';
+import getFlowAction from '../../../controllers/api/v1/flows/get-flow.ee.js';
+
+const router = Router();
+
+router.get('/:flowId', getFlowAction);
+
+export default router;