Release on homebrew

[welpo]

It would be nice to add git-sumi to homebrew.

We're using cargo-dist, which can help: https://opensource.axo.dev/cargo-dist/book/installers/homebrew.html

Homebrew docs: https://docs.brew.sh/Adding-Software-to-Homebrew

[ruudk]

Would be great to be able to download this from Homebrew.