chore: update flake.lock, format using nixfmt-rfc-style in devShells

.gitignore

@@ -1,3 +1,5 @@
+**/.direnv
+/.envrc
 result
 examples/hello-world/.direnv
 examples/hello-world/node_modules/.mf

flake.nix

@@ -5,16 +5,27 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   };
 
-  outputs = { self, nixpkgs }:
-  let
-    supportedSystems = [ "x86_64-linux" ];
-    forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
-      pkgs = import nixpkgs { inherit system; };
-    });
-  in {
-    packages = forEachSupportedSystem ({ pkgs }: rec {
-      wrangler = pkgs.callPackage ./pkgs/wrangler/package.nix { };
-      default = wrangler;
-    });
-  };
+  outputs =
+    { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" ];
+      forEachSupportedSystem =
+        f: nixpkgs.lib.genAttrs supportedSystems (system: f { pkgs = import nixpkgs { inherit system; }; });
+    in
+    {
+      packages = forEachSupportedSystem (
+        { pkgs }:
+        rec {
+          wrangler = pkgs.callPackage ./pkgs/wrangler/package.nix { };
+          default = wrangler;
+        }
+      );
+
+      devShells = forEachSupportedSystem (
+        { pkgs }:
+        {
+          default = pkgs.mkShell { packages = with pkgs; [ nixfmt-rfc-style ]; };
+        }
+      );
+    };
 }

pkgs/wrangler/package.nix

@@ -47,10 +47,15 @@ let
     # on certain subcommands due to this issue.
     platforms = [ "x86_64-linux" ];
   };
-in 
+in
 stdenv.mkDerivation (finalAttrs: {
-  inherit (pin) version; 
-  inherit pname src pnpmDeps meta;
+  inherit (pin) version;
+  inherit
+    pname
+    src
+    pnpmDeps
+    meta
+    ;
 
   buildInputs = [
     llvmPackages.libcxx