make switch-to-configuration-ng module

modules/shell/nix/default.nix

@@ -2,5 +2,6 @@
   imports = [
     ./search.nix
     ./optimization.nix
+    ./switch-to-configuration-ng.nix
   ];
 }

modules/shell/nix/switch-to-configuration-ng.nix

@@ -0,0 +1,15 @@
+{ inputs, options, config, lib, ...}:
+let
+  cfg = config.modules.shell.nix.switch-to-configuration-ng;
+in {
+  options.modules.shell.nix.switch-configuration-ng = {
+    enable = lib.mkEnableOption false;
+  };
+
+  config = lib.mkIf cfg.enable {
+    system.switch = {
+      enable = false;
+      enableNg = true;
+    };
+  };
+}