cli: accept global flags after subcommands

[cnaples79]

Summary

• normalize global flags before parsing
• keep passthrough arguments intact by respecting the separator

Rationale

The flag is defined globally, but when users pass it after the subcommand, ArgumentParser throws an "Unknown option" error. Moving global flags to the front preserves the intended UX while maintaining their global scope.

Fixes #360

[jglogan]

@cnaples79 Thanks for the contribution! Sorry for the delayed response.

We'll still need to review it. I looked it over and it seemed sane though, just want to spend a little more time looking.

The other thing is it looks like you haven't set up commit signatures yet. We can't merge without signed and verified commits. See here for details: https://docs.github.com/en/authentication/managing-commit-signature-verification/telling-git-about-your-signing-key#telling-git-about-your-ssh-key

[cnaples79]

@jglogan thanks for the feedback. I'll update and sign the commits.