Migrate Cliffy commands to clipanion

[winniehell]

Description

Replaces all uses of cliffy/command with clipanion.

I would like to apologize because this refactoring became huge. But given that the APIs of the libraries are very different, I don't know a good way to split this.

part of #10878

migrating cliffy/prompt and cliffy/table will happen in separate pull requests.

Checklist

I have (if applicable):

• filed a contributor agreement.
• referenced the GitHub issue this PR closes
• updated the appropriate changelog in the PR
• ensured the present test suite passes
• added new tests
• created a separate documentation PR in Quarto's website repo and linked it to this PR

[winniehell]

npm imports are not supported by deno bundle, so this is blocked by #4955

[cscheid]

I appreciate the large PR, truly. But let me be frank - we're unlikely to be able to take this any time in the near future, precisely because the changes are so extensive.

[winniehell]

sure, let me know if there is anything I can do to assist in the review process

[cscheid]

I'm going to go ahead and close this one since we're going to be using Cliffy for the foreseeable future, with all its quirks.

[winniehell]

@cscheid would you mind briefly commenting on the main reason(s) for that decision?