New library: argparse, for parsing CLI arguments

[Andrey Zherikov]

On Wednesday, 13 October 2021 at 18:39:47 UTC, SealabJaster wrote:
> On Wednesday, 13 October 2021 at 11:27:40 UTC, Andrey Zherikov 
> wrote:
>> ...
>
> Guess you got fed up with me not updating JCLI :3
>
> Looks great either way, I really like what you've done with the 
> `.Parse!().PreValidate!()` chaining, looks clean.

I actually started with the research how this can be done and 
here is a result.