TODO: properly write the readme

Right now all this is is part of my dotfiles migrated to home-manager.

If I'm going to set this up on a brand new laptop I need to do this

1. install nix
2. clone this repo in .config/home-manager (possibly with nix-shell -p git --run git clone <this-github-repo>)
3. install home manager? (maybe with nix-shell again or whatever offical installation)
4. finally running home-manager switch should reproduce the exact same environment everywhere I use it on any computer.