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-front/src/testing/mock-data/timeline-activities.ts

@@ -1,14 +1,14 @@
-import { Event } from '@/activities/events/types/Event';
+import { TimelineActivity } from '@/activities/timelineActivities/types/TimelineActivity';
 
-export const mockedEvents: Array<Event> = [
+export const mockedTimelineActivities: Array<TimelineActivity> = [
   {
     properties: '{"diff": {"address": {"after": "TEST", "before": ""}}}',
     updatedAt: '2023-04-26T10:12:42.33625+00:00',
     id: '79f84835-b2f9-4ab5-8ab9-17dbcc45dda3',
-    personId: null,
-    companyId: 'ce40eca0-8f4b-4bba-ba91-5cbd870c64d0',
+    linkedObjectMetadataId: '1ad72a42-6ab4-4474-a62a-a57cae3c0298',
+    linkedRecordCachedName: 'Test',
+    linkedRecordId: 'ce40eca0-8f4b-4bba-ba91-5cbd870c64d0',
     name: 'updated.company',
-    opportunityId: null,
     createdAt: '2023-04-26T10:12:42.33625+00:00',
     workspaceMember: {
       __typename: 'WorkspaceMember',
@@ -30,10 +30,10 @@ export const mockedEvents: Array<Event> = [
       '{"after": {"id": "ce40eca0-8f4b-4bba-ba91-5cbd870c64d0", "name": "", "xLink": {"url": "", "label": ""}, "events": {"edges": [], "__typename": "eventConnection"}, "people": {"edges": [], "__typename": "personConnection"}, "address": "", "position": 0.5, "createdAt": "2024-03-24T21:33:45.765295", "employees": null, "favorites": {"edges": [], "__typename": "favoriteConnection"}, "updatedAt": "2024-03-24T21:33:45.765295", "__typename": "company", "domainName": "", "attachments": {"edges": [], "__typename": "attachmentConnection"}, "accountOwner": null, "linkedinLink": {"url": "", "label": ""}, "opportunities": {"edges": [], "__typename": "opportunityConnection"}, "accountOwnerId": null, "activityTargets": {"edges": [], "__typename": "activityTargetConnection"}, "idealCustomerProfile": false, "annualRecurringRevenue": {"amountMicros": null, "currencyCode": ""}}}',
     updatedAt: new Date().toISOString(),
     id: '1ad72a42-6ab4-4474-a62a-a57cae3c0298',
-    personId: null,
-    companyId: 'ce40eca0-8f4b-4bba-ba91-5cbd870c64d0',
     name: 'created.company',
-    opportunityId: null,
+    linkedObjectMetadataId: '1ad72a42-6ab4-4474-a62a-a57cae3c0298',
+    linkedRecordCachedName: 'Test',
+    linkedRecordId: 'ce40eca0-8f4b-4bba-ba91-5cbd870c64d0',
     createdAt: new Date().toISOString(),
     workspaceMember: {
       __typename: 'WorkspaceMember',