POC timeline activity (#5697)

TODO: 
- remove WorkspaceIsNotAuditLogged decorators on activity/activityTarget
to log task/note creations
- handle attachments
-  fix css and remove unnecessary styled components or duplicates

packages/twenty-front/src/modules/activities/timelineActivities/contexts/TimelineActivityContext.ts

@@ -0,0 +1,10 @@
+import { createContext } from 'react';
+
+type TimelineActivityContextValue = {
+  labelIdentifierValue: string;
+};
+
+export const TimelineActivityContext =
+  createContext<TimelineActivityContextValue>({
+    labelIdentifierValue: '',
+  });