Autocomplete for command line

[pykong]

Support autocompletion for command line. Like completing paths and options.

• Bash
• Fish
• Zsh
• PowerShell
• MacShell
• ...

TODO:

• [ ] How complicated could this be?
• [ ] Is there any library helping to bring autocompletion to many different shells?

[pykong]

@Yajo can plumbum provide autocompletion?

[yajo]

I think it has something but never tested it: https://plumbum.readthedocs.io/en/latest/_modules/plumbum/cli/application.html#Application.autocomplete

I guess this should be fixed in plumbum if missing, so all plumbum apps have the same feature for the same effort.