repalce astrovim with nvchad

pkgs/nvchad/default.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, pkgs }:
+
+let
+  custom = ./custom;
+in
+stdenv.mkDerivation {
+  pname = "nvchad";
+  version = "2.0.0";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "NvChad";
+    repo = "NvChad";
+    rev = "refs/heads/v2.0";
+    # sha256 = "sha256-tKMvKdB3jPSvcyewaOe8oak3pXhjAcLyyxgGMiMeqeU=";
+  };
+
+  installPhase = ''
+    mkdir $out
+    cp -r * "$out/"
+    mkdir -p "$out/lua/custom"
+    cp -r ${custom}/* "$out/lua/custom/"
+  '';
+
+  meta = with lib; {
+    description = "NvChad";
+    homepage = "https://github.com/NvChad/NvChad";
+    platforms = platforms.all;
+    license = licenses.gpl3;
+  };
+}