nixpkgs/neovim: include ruff

.config/nixpkgs/neovim/neovim.nix

@@ -14,6 +14,7 @@
 , svelte-language-server
 , vscode-langservers-extracted
 , pyright
+, ruff
 , blink-cmp
 , fetchFromGitHub
 , fetchpatch
@@ -51,6 +52,7 @@ let
     svelte-language-server
     vscode-langservers-extracted
     pyright
+    ruff
     tsc
   ];