Update args package

[jakemac53]

This version provides suggestions for alternate commands when an unrecognized command is used.

Fixes #74521
Fixes #46009

Example output is as follows:

@jonahwilliams I noticed there seems to be a fair bit of whitespace here between the suggestions and the usage footer, let me know if you think that is an issue. I am not sure if this is expected.

This feature is tested in the args package, I don't think we need additional tests here. It may affect integration tests if there are any for this case, in which case I can update them.

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement].
• I signed the [CLA].
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test-exempt.
• All existing and new tests are passing.

[jonahwilliams]

LGTM!!

(Will keep an eye out for test failures, but should be OK)

[jakemac53]

Should I actually mark this as closing #74521? It does seem like consensus was reached around this solution.

[jonahwilliams]

Yes, I think we might have another one about typos, one sec

[jonahwilliams]

maybe this one too: #46009 ?

[jonahwilliams]

LGTM