feat: add new host and start modularizing system configuration

modules/nixos/audio.nix

@@ -0,0 +1,15 @@
+{ pkgs, ... }:
+{
+  # For real-time audio/production consider: https://github.com/musnix/musnix
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+
+  environment.systemPackages = with pkgs; [
+    pavucontrol
+  ];
+}