Enable audio and add a basic home configuration

modules/gui.nix

@@ -2,16 +2,13 @@
 
 {
   # Display manager
-  services.xserver = {
-    enable = true;
-    displayManager = {
-      defaultSession = "sway";
-      sddm = {
+  services.xserver.displayManager = {
+    defaultSession = "sway";
+    sddm = {
+      enable = true;
+      autoLogin = {
         enable = true;
-        autoLogin = {
-          enable = true;
-          user = "coolneng";
-        };
+        user = "coolneng";
       };
     };
   };