CLI: Add auto-complete for git related stuff (remotes, branches) and also for command and options

[rrebollo]

IDK whether I'm missing something but I don't get auto complete suggestions not for git related stuff or command or options.

[sebalix]

You don't miss anything. To auto-complete a command, a script to source in your shell has to be provided, so the shell knows how to auto-complete or proposes relevant choices to the user for a given parameter. I never did that, and it won't be my priority right now.

It is a good idea, and any contribution to address this is welcome of course.

[bealdav]

Probably here https://fishshell.com your best friend