Date formatting per workspace member settings (#6408)

Implement date formatting per workspace member settings

We'll need another round to maybe initialize all workspaces on the
default settings.

For now the default behavior is to take system settings if nothing is
found in DB.

---------

Co-authored-by: Weiko <corentin@twenty.com>

packages/twenty-front/src/testing/mock-data/timeline-calendar-events.ts

@@ -1,5 +1,7 @@
-import { TimelineCalendarEvent } from '~/generated-metadata/graphql';
-import { CalendarChannelVisibility } from '~/generated/graphql';
+import {
+  CalendarChannelVisibility,
+  TimelineCalendarEvent,
+} from '~/generated/graphql';
 
 export const mockedTimelineCalendarEvents: TimelineCalendarEvent[] = [
   {