begin migration to dendritic pattern

modules/features/nh.nix

@@ -0,0 +1,11 @@
+{ inputs, self, ... }: {
+  flake.nixosModules.global = { pkgs, config, ... }: {
+    environment.systemPackages = [
+      inputs.nh.packages.${pkgs.stdenv.hostPlatform.system}.default
+    ];
+    programs.nh = {
+      enable = true;
+      flake = "/home/grey/nixos";
+    };
+  };
+}