rmeove upstream nvchad flake

modules/core/nvim.nix

@@ -0,0 +1,9 @@
+{
+  hj.files."./.config/nvim" = {
+    source = builtins.fetchGit {
+      url = "https://git.archfox.org/poslop/nvbad.git";
+      rev = "eab1653d4e3663562c597bab493eeb12d94d905c";
+    };
+    uid = "poslop";
+  };
+}