[new] shells/nushell

[Solène Rapenne]

hi,

this is a port for the shell nushell (non POSIX)

- https://www.nushell.sh/

It's my first Rust port, I took example from other, especially for the
line MODCARGO_CRATES_UPDATE

tested on amd64, works fine

nushell.tgz
Description: application/compressed-tar