6071 return only updated fields of records in zapier update trigger (#8193)

- move webhook triggers into `entity-events-to-db.listener.ts`
- refactor event management
- add a `@OnDatabaseEvent` decorator to manage database events
- add updatedFields in updated events
- update openApi webhooks docs
- update zapier integration

packages/twenty-zapier/src/utils/requestDb.ts

@@ -79,7 +79,7 @@ export const requestDbViaRestApi = (
   z: ZObject,
   bundle: Bundle,
   objectNamePlural: string,
-) => {
+): Promise<Record<string, any>[]> => {
   const options = {
     url: `${
       bundle.authData.apiUrl || process.env.SERVER_BASE_URL