start adding macos configuration

hosts/macbook/default.nix

@@ -0,0 +1,18 @@
+{ nixpkgs, darwin, home-manager, nur, globals, ... }:
+
+# System configuration for my MacBook
+darwin.lib.darwinSystem {
+  system = "x86_64-darwin";
+  specialArgs = { };
+  modules = [
+    globals
+    home-manager.darwinModules.home-manager
+    {
+      networking.hostName = "desktop";
+      gui.enable = true;
+      gui.compositor.enable = true;
+      nixpkgs.overlays = [ nur.overlay ];
+    }
+    ../common.nix
+  ];
+}