feat: volume control on tux, moved wg into common

nix/modules/pipewire.nix

@@ -0,0 +1,13 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+{
+  config = lib.mkIf config.services.pipewire.enable {
+    environment.systemPackages = with pkgs; [
+      pamixer
+    ];
+  };
+}