chore: add devshell to nvim config

dotfiles/nvim/flake.nix

@@ -0,0 +1,39 @@
+{
+  description = "Neovim configuration";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, fenix }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        fenixLib = fenix.packages.${system};
+        rustToolchain = fenixLib.stable.toolchain;
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            lua-language-server
+            stylua
+            ripgrep
+            fd
+
+            nodejs_24
+            python313
+            rustToolchain
+          ];
+          
+          shellHook = ''
+            echo "Neovim development environment"
+            echo "nvim is configured with your local config"
+          '';
+        };
+      });
+}