feat(cli): support max width arg

[awe123343]

I have a project wanna moving from ktfmt in spotless gradle plugin to cli, but have a blocker right now due to we set max width to 120 with ktfmt spotless gradle plugin. Hence supporting this in CLI, looks like we support customising this in both spotless plugin and web UI, but just not CLI.

[hick209]

We're discussing internally whether we want these to be available on the command line.

BTW there are merge conflicts now that we landed #467

[awe123343]

We're discussing internally whether we want these to be available on the command line.

BTW there are merge conflicts now that we landed #467

Rebased and solved conflicts while waiting for discussion

[hick209]

This would go against this principle here so we overall don't want to support it.

I understand this is likely not the answer you wanted, but luckily there's an easy workaround.
You can build a simple Java program and runs ktfmt for you (from source) where you set it up appropriately as you can control the max width param from there.

I hope that is helpful to your use case and regardless I'm thankful for contributions to ktfmt