Add workflow branches to lab (#13780)

as title

<img width="991" height="757" alt="image"
src="https://github.com/user-attachments/assets/7c7e042f-f616-40a6-8e82-3898a700b9da"
/>

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

packages/twenty-server/src/engine/core-modules/feature-flag/constants/public-feature-flag.const.ts

@@ -49,6 +49,14 @@ export const PUBLIC_FEATURE_FLAGS: PublicFeatureFlag[] = [
         'https://twenty.com/images/lab/is-worklfow-filtering-enabled.png',
     },
   },
+  {
+    key: FeatureFlagKey.IS_WORKFLOW_BRANCH_ENABLED,
+    metadata: {
+      label: 'Workflow Branches',
+      description: 'Create multiple branches on your workflows',
+      imagePath: 'https://twenty.com/images/lab/is-workflow-branch-enabled.png',
+    },
+  },
   ...(process.env.CLOUDFLARE_API_KEY
     ? [
         // {