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-server/src/engine/api/graphql/graphql-query-runner/enums/database-event-action.ts

@@ -0,0 +1,6 @@
+export enum DatabaseEventAction {
+  CREATED = 'created',
+  UPDATED = 'updated',
+  DELETED = 'deleted',
+  DESTROYED = 'destroyed',
+}