Add output to workflow run (#7276)

Example of output stored for following workflow:

<img width="244" alt="Capture d’écran 2024-09-27 à 11 18 06"
src="https://github.com/user-attachments/assets/722bfa96-2dd1-41f7-ab87-d39584ac9efc">

Output:

```
{"steps": [
  {"type": "CODE", "result": {"email": "test@twenty.com"}}, 
  {"type": "SEND_EMAIL", "result": {"success": true}}
]}
```

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/constants/standard-field-ids.ts

@@ -415,6 +415,7 @@ export const WORKFLOW_RUN_STANDARD_FIELD_IDS = {
   endedAt: '20202020-e1c1-4b6b-bbbd-b2beaf2e159e',
   status: '20202020-6b3e-4f9c-8c2b-2e5b8e6d6f3b',
   createdBy: '20202020-6007-401a-8aa5-e6f38581a6f3',
+  output: '20202020-7be4-4db2-8ac6-3ff0d740843d',
 };
 
 export const WORKFLOW_VERSION_STANDARD_FIELD_IDS = {