Copy and impove `home-manager` module integration from `nix-on-darwin` for `nixos`
Add `homix` *server* with NVIDIA drivers, `wayland` + `river`, Jellyfin, etc.
Now a bunch of configurations may be created from two functions and a set:
`pred` - a validator that says whether a configuration is valid
`mkHost` - a generator for that system's configuration
`machines` - a nested attrset containing all the info for the machines
Place all configurations in `machines/${manager}/${system}/${hostname}/...`:
- `${manager}` - One of `nixos`, `nix-on-droid`, `nix-darwin` or `home-manager`
- `${system}` - A system's architecture (can be many)
- `${hostname}` - A system's hostname (can be many)
The flake now automatically generates the needed configurations based on the above structure.
It only generates configurations for valid directory structures:
- It wouldn't generate a NixOS config if there isn't a `configuration.nix` file
- ...
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`