Adds smartcat, a cat-like tool to interact with large language models on
the command line.
I've been looking for a minimal tool to easily work with a locally
running ollama instance, and this was a great fit so I figured I'd try my
hand at adding it to nixpkgs and maintaining it.
Co-authored-by: éclairevoyant <848000+eclairevoyant@users.noreply.github.com>
