Add git-ps-rs formulae for v3.1.0
Add git-ps-rs formulae for v3.1.0

Add git-ps-rs formulae so that people can instally git-ps-rs from
Homebrew.

I did a basic formulae for Rust command line tool built from source. I
also hooked in the zsh and bash completion installation as well.

uptech/homebrew-oss