Reorganize modules

modules/services.nix

@@ -0,0 +1,23 @@
+{ config, pkgs, ... }:
+
+{
+  services.openssh.enable = true;
+
+  services = {
+    displayManager.gdm.enable = true;
+    desktopManager.gnome.enable = true;
+
+    xserver = {
+      enable = true;
+      xkb.layout = "us";
+      xkb.variant = "";
+    };
+
+    pulseaudio.enable = false;
+
+    pipewire.enable = true;
+    pipewire.alsa.enable = true;
+    pipewire.alsa.support32Bit = true;
+    pipewire.pulse.enable = true;
+  };
+}