Enable audio and add a basic home configuration

modules/gui.nix

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