Add defuddle devshell

flake.nix

@@ -0,0 +1,38 @@
+{
+  description = "llm-wiki development shell";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nur-packages = {
+      url = "github:yutakobayashidev/nur-packages";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    { nixpkgs, nur-packages, ... }:
+    let
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+      forAllSystems = nixpkgs.lib.genAttrs systems;
+    in
+    {
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            packages = [
+              nur-packages.packages.${system}.defuddle
+            ];
+          };
+        }
+      );
+    };
+}