Copy and impove `home-manager` module integration from `nix-on-darwin` for `nixos`
Add `homix` *server* with NVIDIA drivers, `wayland` + `river`, Jellyfin, etc.
Based on `cce47e4df5/standard`
Adds (experimental) support for `nix-on-droid` and `nix-on-darwin`
Includes support for multiple hosts of each base
Adds config for `cheetah` on `nix-on-droid`
