nix: move all nixos configuration to nixosModules

export them

nix/nixosModules/named/carbon/audio.nix

@@ -0,0 +1,35 @@
+{ pkgs, ... }:
+{
+  sound = {
+    enable = true;
+    mediaKeys.enable = true;
+  };
+  security.rtkit.enable = true;
+
+  services.pipewire = {
+
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    jack.enable = true;
+
+    extraConfig.pipewire = {
+      "10-buffer_size" = {
+        "context.properties" = {
+          "default.clock.quantum" = 2048;
+          "default.clock.min-quantum" = 1024;
+        };
+      };
+    };
+
+  };
+
+  environment.systemPackages = [
+    pkgs.helvum
+    pkgs.pavucontrol
+    pkgs.easyeffects
+  ];
+
+  users.users."leana".extraGroups = [ "audio" ];
+}