Fix hello world application (#14880)

Updates of the hello-world application
- remove the old hello-world application
- adds an object "postCard"
- adds a serverlessFunction `create-new-post-card` that calls the twenty
api to create a new postCard record
- add a route trigger /post-card/create?recipient=John

packages/twenty-server/src/engine/twenty-orm/entity-manager/workspace-entity-manager.spec.ts

@@ -137,7 +137,6 @@ describe('WorkspaceEntityManager', () => {
         IS_PAGE_LAYOUT_ENABLED: false,
         IS_MESSAGE_FOLDER_CONTROL_ENABLED: false,
         IS_WORKFLOW_ITERATOR_ENABLED: false,
-        IS_DATABASE_EVENT_TRIGGER_ENABLED: false,
         IS_CALENDAR_VIEW_ENABLED: false,
         IS_GROUP_BY_ENABLED: true,
         IS_PUBLIC_DOMAIN_ENABLED: false,