Support bash auto-completion

[emouty]

To ease usage of cli it would be nice to add shell auto-completion support on it, especially on when running oidc token . It would help avoid the need of manually calling oidc list to check names of clients.

[ctron]

Ah cool. Sure. How would that work?

[emouty]

I'm not very familiar with rust and its ecosystem but from what I've found it seems that there is a clap crate that would help to generate completion lap_complete but it seems limited to static defined sub-commands (which could be a first step of implementation).

I have also found an article detailing how to write completions in pure rust and with it the author has made a crate to help generate them shell_completion

[ctron]

I'd definitely need some help on this. PRs welcome 😉