added colorscheme default option

flake.nix

@@ -22,7 +22,7 @@
         let
           nixvimLib = nixvim.lib.${system};
           nixvim' = nixvim.legacyPackages.${system};
-          nixvimModule = opts: {
+          nixvimModule = { opts }: {
             inherit pkgs;
             module = import ./config; # import the module directly
             # You can use `extraSpecialArgs` to pass additional arguments to your module files
@@ -31,7 +31,7 @@
               inherit opts;
             };
           };
-          nvim = opts: nixvim'.makeNixvimWithModule (nixvimModule opts);
+          nvim = { opts }: nixvim'.makeNixvimWithModule (nixvimModule { inherit opts; });
         in
         {
           checks = {