many changes and more modularizing

hosts/nb/modules/nvim/default.nix

@@ -1,6 +1,9 @@
 { pkgs, ... }:
 {
   environment.variables = { EDITOR = "vim"; };
+  nixpkgs.overlays = [
+      (import ./chatgpt.nix)
+  ];
 
   environment.systemPackages = with pkgs; [
     nodePackages.typescript-language-server
@@ -11,6 +14,8 @@
     gopls
     lazygit
     ripgrep
+    lua
+    luaPackages.lyaml
     (neovim.override {
       vimAlias = true;
       configure = {
@@ -19,6 +24,7 @@
             bigfile-nvim
             bufferline-nvim
             catppuccin-nvim
+            chatgpt-nvim
             cmp-buffer
             cmp-nvim-lsp
             cmp-path
@@ -66,6 +72,7 @@
           luaConfig = builtins.concatStringsSep "\n" (map luaRequire [
             "init"
             "keymappings"
+            "chatgpt"
             "copilot"
             "icons"
             "lspconfig"
@@ -86,6 +93,7 @@
           EOF
         '';
       };
+      extraLuaPackages = luaPackages: [ luaPackages.lyaml ];
     }
   )];
 }