Motivation
We're getting enough commands now that it would be good to introduce some form of organization as per

https://typer.tiangolo.com/tutorial/commands/help/#help-panels-for-commands

I reckon two cases of this:

• The usethis subcommands at the high level
• The usethis tool subcommands, grouping them somewhat categorically.

Summary of desired enhancement
At some help panels to the CLI.