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/modules/object-metadata/states/objectMetadataItemFamilySelector.ts

@@ -33,7 +33,6 @@ export const objectMetadataItemFamilySelector = selectorFamily<
           ) ?? null
         );
       }
-
       return null;
     },
 });

packages/twenty-front/src/modules/object-metadata/types/CoreObjectNameSingular.ts

@@ -9,7 +9,7 @@ export enum CoreObjectNameSingular {
   Comment = 'comment',
   Company = 'company',
   ConnectedAccount = 'connectedAccount',
-  Event = 'event',
+  TimelineActivity = 'timelineActivity',
   Favorite = 'favorite',
   Message = 'message',
   MessageChannel = 'messageChannel',