refactor: convert capabilities:create command to yargs

[rossiam]

• converted capabilities:create command to yargs
• unit tests to be added later
• there are several TODOs that were carried over from previous code

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Latest commit: 956ead7

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[Sitlintac]

There are some prompts and other user feedback that could be cleaned up, but I don't think it needs to be done in this PR since we'll be coming back to the TODOs eventually.