refactor(nvf): move core nvf config to a module

modules/hm/programs/editor.nix

@@ -0,0 +1,29 @@
+{
+  config,
+  lib,
+  inputs,
+  pkgs,
+  ...
+}:
+let
+  username = config.nixosModules.mainUser;
+in
+{
+  config = lib.mkIf (config.hmModules.mainApps.editor == "nvf") (
+    lib.mkMerge [
+      {
+        nix.settings.substituters = [ "https://nvf.cachix.org" ];
+        nix.settings.trusted-public-keys = [
+          "nvf.cachix.org-1:GMQWiUhZ6ux9D5CvFFMwnc2nFrUHTeGaXRlVBXo+naI="
+        ];
+
+        home-manager.users.${username} = {
+          imports = [
+            inputs.nvf.homeManagerModules.default
+            ./nvf/core.nix
+          ];
+        };
+      }
+    ]
+  );
+}