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/modules/timeline/timeline-activity.module.ts

@@ -0,0 +1,16 @@
+import { Module } from '@nestjs/common';
+
+import { ObjectMetadataRepositoryModule } from 'src/engine/object-metadata-repository/object-metadata-repository.module';
+import { WorkspaceDataSourceModule } from 'src/engine/workspace-datasource/workspace-datasource.module';
+import { TimelineActivityService } from 'src/modules/timeline/services/timeline-activity.service';
+import { TimelineActivityObjectMetadata } from 'src/modules/timeline/standard-objects/timeline-activity.object-metadata';
+
+@Module({
+  imports: [
+    WorkspaceDataSourceModule,
+    ObjectMetadataRepositoryModule.forFeature([TimelineActivityObjectMetadata]),
+  ],
+  providers: [TimelineActivityService],
+  exports: [TimelineActivityService],
+})
+export class TimelineActivityModule {}