docs(readme): add nixvim example (#123)

README.md

@@ -285,10 +285,11 @@ require("lz.n").load {
 
 <details>
   <summary>
-    <b><a href="https://wiki.nixos.org/wiki/Neovim">Nix (Home Manager) example</a></b>
+    <b><a href="https://wiki.nixos.org/wiki/Neovim">Nix (Home Manager)</a> example</b>
   </summary>
 
   ```nix
+  {
     programs.neovim = {
       enable = true;
       plugins = with pkgs.vimPlugins [
@@ -317,6 +318,35 @@ require("lz.n").load {
         }
       ];
     };
+  }
+  ```
+
+</details>
+
+<details>
+  <summary>
+    <b><a href="https://wiki.nixos.org/wiki/Neovim">Nix (NixVim)</a> example</b>
+  </summary>
+
+  > You can find up-to-date NixVim documentation for lazy-loading with `lz.n` here:
+  >
+  > https://nix-community.github.io/nixvim/user-guide/lazy-loading
+
+  ```nix
+  {
+    # Enable lz.n as lazy-loading provider
+    plugins.lz-n.enable = true;
+
+    plugins.telescope = {
+      enable = true;
+      lazyLoad.settings.cmd = "Telescope";
+    };
+
+    colorschemes.catppuccin = {
+      enable = true;
+      lazyLoad.settings.colorscheme = "catppuccin";
+    };
+  }
   ```
 
 </details>