Better command line arguments management with Click

[virajkanwade]

Currently the code is relying on sys.argv.

https://click.palletsprojects.com/en/8.1.x/ is a great library for arguments passing to command line.

Might be a good improvement

[dantownsend]

We use this library currently for most of our CLI: https://github.com/piccolo-orm/targ

You're right, we do use sys.argv in a few places.

The reason we made something custom rather than using click, is it gives us a bit more control over the look of our CLI. And it makes registering custom CLI commands really easy.