fix(nvim): use unstable pkgset

Instead of setting some specific unstable packages, make nixvim always
use packages from nixos-unstable.

flake-modules/nixos-modules.nix

@@ -2,10 +2,17 @@
 {
   flake.nixosModules =
     let
-      nvim-config.imports = [
-        inputs.nixvim.homeManagerModules.nixvim
-        ../nvim
-      ];
+      nvim-config =
+        { pkgs, ... }:
+        {
+          imports = [
+            inputs.nixvim.homeManagerModules.nixvim
+            (import ../nvim {
+              inherit (inputs) unstable;
+              inherit (pkgs) system;
+            })
+          ];
+        };
       homeManagerModuleSandalone = import ../home {
         inherit nvim-config;
         inherit (inputs) stylix;

flake-modules/nvim.nix

@@ -9,7 +9,11 @@
       nixvim = inputs.nixvim.legacyPackages.${system};
       module = {
         inherit pkgs;
-        module = ../nvim/standalone.nix;
+        extraSpecialArgs = {
+          inherit (inputs) unstable;
+          inherit system;
+        };
+        module = import ../nvim/standalone.nix { standalone = true; };
       };
     in
     {

flake-modules/overlays.nix

@@ -17,8 +17,6 @@
       inherit (unstablePkgs)
         gitoxide
         jujutsu
-        neovim-unwrapped
-        ruff # nixpkgs stable version is improperly configured by nixvim
         # wezterm
         ;
     };