Remove legacy links to CodeshiftCommunity

[danieldelcore]

What is this change?

Updating docs to remove deprecated URLs/ CLI

Why are we making this change?

The new stuff has moved to a new namespace / domain

PR checklist

Don't delete me!

I have...

• Updated or added applicable tests
• Updated the documentation in website/

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Latest commit: ffbf06a

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[danieldelcore]

Thanks guys if someone could merge for me that'd be great 🙏 I don't have permish