chore: refactor system modules

system/hardware/sound.nix

@@ -0,0 +1,44 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.system.hardware.sound;
+in {
+  options.system.hardware.sound = {
+    enable = mkEnableOption "Whether to enable sounds with Pipewire";
+    scarlett.enable = mkEnableOption "Activate support for Scarlett sound card";
+    alsa = mkOption {
+      type = types.bool;
+      example = true;
+      default = true;
+      description = "Whether to enable ALSA support with Pipewire";
+    };
+    jack = mkOption {
+      type = types.bool;
+      example = true;
+      default = false;
+      description = "Whether to enable JACK support with Pipewire";
+    };
+    package = mkOption {
+      type = types.package;
+      example = pkgs.pulseaudio;
+      default = pkgs.pulseaudioFull;
+      description = "Which base package to use for PulseAudio";
+    };
+  };
+
+  config = {
+    environment.systemPackages = mkIf cfg.scarlett.enable [pkgs.alsa-scarlett-gui];
+    services.pipewire = mkIf cfg.enable {
+      enable = true;
+      alsa = mkIf cfg.alsa {
+        enable = mkDefault true;
+        support32Bit = mkDefault true;
+      };
+      jack.enable = mkDefault cfg.jack;
+    };
+  };
+}