fix: created by prefill value for demo instance

[Nabhag8848]

ISSUE

• Closes Update demo data "Created by" values #6924

[greptile-apps]

PR Summary

This pull request updates the 'createdByName' field for sample company and person data in the workspace prefill functionality.

• Modified packages/twenty-server/src/engine/workspace-manager/standard-objects-prefill-data/company.ts to change 'createdByName' from 'System' to 'Twenty (Sample data)' for all sample companies
• Updated packages/twenty-server/src/engine/workspace-manager/standard-objects-prefill-data/person.ts to set 'createdByName' as 'Twenty (Sample data)' for all sample person entries
• These changes address issue Update demo data "Created by" values #6924, improving the context and appearance of sample data in new workspaces

_{2 file(s) reviewed, 1 comment(s)
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[greptile-apps]

style: Consider adding a constant for 'Twenty (Sample data)' to maintain consistency and ease future updates

[Nabhag8848]

@Bonapara Ready for review

[charlesBochet]

@Nabhag8848 I believe @FelixMalfait wanted to discuss this one with @Bonapara prio to merging it.
It's likely that we want to introduce another creator source instead of only modifying the createdByName

[FelixMalfait]

/award 150

[oss-gg]

Awarding Nabhag8848: 150 points 🕹️ Well done! Check out your new contribution on oss.gg/Nabhag8848

[FelixMalfait]

I'm sorry @Nabhag8848 I didn't see this PR. Someone also raise a PR which I reviewed and ended up doing something else #7424
(I ended up keeping System and adding a different icon)