Add help option description to vi

[casseyshao]

Add help option description for the vi command.

[withfig-bot]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[withfig-bot]

Overview

src/vi.ts:

Info:

[casseyshao]

I have read the CLA Document and I hereby sign the CLA

[casseyshao]

recheck

[withfig-bot]

Hello @casseyshao,
thank you very much for creating a Pull Request!
Here is a small checklist to get this PR merged as quickly as possible:

• Do all subcommands / options which take arguments include the args property (args: {})?
• Are all options modular? E.g. -a -u -x instead of -aux
• Have all other checks passed?

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[casseyshao]

Hi @grant0417 ! Sorry about that, I re-ran lint and Prettier, and updated this PR to pass the lint check!