chore: archive and redirect

[tmastrom]

Update the readme to redirect users to the monorepo where this package has been migrated.

Merge this when the migration PR has been merged.

[changeset-bot]

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Latest commit: 4915040

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[hanspagel]

I wouldn’t delete the content of the repository! There’s a way to archive and mark the repository as read-only in the settings. :)