8726 workflow add a test button in workflow code step (#9016)

- add test button to workflow code step
- add test tab to workflow code step


https://github.com/user-attachments/assets/e180a827-7321-49a2-8026-88490c557da2



![image](https://github.com/user-attachments/assets/cacbd756-de3f-4141-a84c-8e1853f6556b)

![image](https://github.com/user-attachments/assets/ee170d81-8a22-4178-bd6d-11a0e8c73365)

packages/twenty-front/src/pages/auth/PasswordReset.tsx

@@ -154,7 +154,9 @@ export const PasswordReset = () => {
     } catch (err) {
       logError(err);
       enqueueSnackBar(
-        (err as Error)?.message || 'An error occurred while updating password',
+        err instanceof Error
+          ? err.message
+          : 'An error occurred while updating password',
         {
           variant: SnackBarVariant.Error,
         },