Switch from gnome to XMonad (config from dots)

modules/x.nix

@@ -1,10 +1,14 @@
 { ... }:
 
 {
+  services.xserver.windowManager.xmonad = {
+   enable = true;
+   enableContribAndExtras = true;
+   config = builtins.readFile ../dots/.xmonad/xmonad.hs;
+ };
+
   services.xserver = {
     enable = true;
-    displayManager.gdm.enable = true;
-    desktopManager.gnome.enable = true;
     xkb.layout = "us";
     xkb.variant = "";
   };