Improve seeds 3 (#12740)

- Fix an issue where custom object were seeded with 2 views, and with
the wrong icon
- ACME becomes YCombinator
- Allow 2 workspaces to have different metadata seeded
- Add many seeds for messages
- Add many seeds for calendar events
- Randomize createdBy for person and companies

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Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

packages/twenty-server/src/engine/workspace-manager/standard-objects-prefill-data/views/tasks-all.view.ts

@@ -20,7 +20,7 @@ export const tasksAllView = (objectMetadataItems: ObjectMetadataEntity[]) => {
     type: 'table',
     key: 'INDEX',
     position: 0,
-    icon: 'IconCheckbox',
+    icon: 'IconList',
     kanbanFieldMetadataId: '',
     filters: [] /* [
       {