Add Commit Command

Commit Command 🎉

I've been finding myself wanting the ease of use of lk save to type a normal unquoted sentence and have it become the commit message, but not push.

I considered adding --no-push to save, but rather than type more characters, this continues the trend of following git's own commands and let's you type lk c some cool new changes.

save remains as a wrapper for commit + push, using the same functions and option definition, thanks to Rust + Clap's composition 💪.

Upgrade via cargo

cargo install loki-cli