refactor: make the whole thing more generic

modules/nixos/hardware/audio.nix

@@ -0,0 +1,22 @@
+{ pkgs, lib, config, ... }:
+with lib;
+
+let cfg = config.hardware.audio.preset.pipewire;
+
+in {
+  options.hardware.audio.preset.pipewire = {
+    enable = mkEnableOption "Enable pipewire with sane defaults";
+  };
+
+  config = mkIf cfg.enable {
+    hardware.pulseaudio.enable = false;
+    security.rtkit.enable = true;
+    services.pipewire = {
+      enable = true;
+      alsa.enable = true;
+      alsa.support32Bit = true;
+      pulse.enable = true;
+      jack.enable = true;
+    };
+  };
+}