Allow capturing trailing var-args

[Threated]

The clap flag for it is this:
https://docs.rs/clap/latest/clap/struct.Arg.html#method.trailing_var_arg

This would be really useful for wrapper like cli scripts.

[fasterthanlime]

I think that's just a ::positional Vec ? (at the end of your struct)

[Threated]

Yes that works but not for flag style args like --flag or -f or something. But if this is no niche of a feature feel free to close the issue