New Timeline (#4936)

Refactored the code to introduce two different concepts:
- AuditLogs (immutable, raw data)
- TimelineActivities (user-friendly, transformed data)

Still some work needed:
- Add message, files, calendar events to timeline (~2 hours if done
naively)
- Refactor repository to try to abstract concept when we can (tbd, wait
for Twenty ORM)
- Introduce ability to display child timelines on parent timeline with
filtering (~2 days)
- Improve UI: add links to open note/task, improve diff display, etc
(half a day)
- Decide the path forward for Task vs Notes: either introduce a new
field type "Record Type" and start going into that direction ; or split
in two objects?
- Trigger updates when a field is changed (will be solved by real-time /
websockets: 2 weeks)
- Integrate behavioral events (1 day for POC, 1 week for
clean/documented)

<img width="1248" alt="Screenshot 2024-04-12 at 09 24 49"
src="https://github.com/twentyhq/twenty/assets/6399865/9428db1a-ab2b-492c-8b0b-d4d9a36e81fa">

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-objects/index.ts

@@ -24,21 +24,29 @@ import { ViewObjectMetadata } from 'src/modules/view/standard-objects/view.objec
 import { WebhookObjectMetadata } from 'src/modules/webhook/standard-objects/webhook.object-metadata';
 import { WorkspaceMemberObjectMetadata } from 'src/modules/workspace-member/standard-objects/workspace-member.object-metadata';
 import { CalendarChannelEventAssociationObjectMetadata } from 'src/modules/calendar/standard-objects/calendar-channel-event-association.object-metadata';
-import { EventObjectMetadata } from 'src/modules/event/standard-objects/event.object-metadata';
+import { AuditLogObjectMetadata } from 'src/modules/timeline/standard-objects/audit-log.object-metadata';
+import { TimelineActivityObjectMetadata } from 'src/modules/timeline/standard-objects/timeline-activity.object-metadata';
+import { BehavioralEventObjectMetadata } from 'src/modules/timeline/standard-objects/behavioral-event.object-metadata';
 
 export const standardObjectMetadataDefinitions = [
   ActivityTargetObjectMetadata,
   ActivityObjectMetadata,
   ApiKeyObjectMetadata,
+  AuditLogObjectMetadata,
   AttachmentObjectMetadata,
+  BehavioralEventObjectMetadata,
   BlocklistObjectMetadata,
+  CalendarEventObjectMetadata,
+  CalendarChannelObjectMetadata,
+  CalendarChannelEventAssociationObjectMetadata,
+  CalendarEventParticipantObjectMetadata,
   CommentObjectMetadata,
   CompanyObjectMetadata,
   ConnectedAccountObjectMetadata,
-  EventObjectMetadata,
   FavoriteObjectMetadata,
   OpportunityObjectMetadata,
   PersonObjectMetadata,
+  TimelineActivityObjectMetadata,
   ViewFieldObjectMetadata,
   ViewFilterObjectMetadata,
   ViewSortObjectMetadata,
@@ -50,8 +58,4 @@ export const standardObjectMetadataDefinitions = [
   MessageChannelObjectMetadata,
   MessageParticipantObjectMetadata,
   MessageChannelMessageAssociationObjectMetadata,
-  CalendarEventObjectMetadata,
-  CalendarChannelObjectMetadata,
-  CalendarChannelEventAssociationObjectMetadata,
-  CalendarEventParticipantObjectMetadata,
 ];