Set up direnv and update flake inputs (#6526)

Signed-off-by: Yusuke Shimizu <stm1051212@gmail.com>

.envrc

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+use flake

.gitignore

@@ -71,6 +71,9 @@ crates/goose/tests/mcp_replays/*errors.txt
 # Nix build output
 result
 
+# direnv
+.direnv/
+
 # Goose self-test artifacts
 gooseselftest/
 .tasks/

flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1755186698,
-        "narHash": "sha256-wNO3+Ks2jZJ4nTHMuks+cxAiVBGNuEBXsT29Bz6HASo=",
+        "lastModified": 1768305791,
+        "narHash": "sha256-AIdl6WAn9aymeaH/NvBj0H9qM+XuAuYbGMZaP0zcXAQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fbcf476f790d8a217c3eab4e12033dc4a0f6d23c",
+        "rev": "1412caf7bf9e660f2f962917c14b1ea1c3bc695e",
         "type": "github"
       },
       "original": {
@@ -47,11 +47,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1755571033,
-        "narHash": "sha256-V8gmZBfMiFGCyGJQx/yO81LFJ4d/I5Jxs2id96rLxrM=",
+        "lastModified": 1768445213,
+        "narHash": "sha256-y0BglISgDr61vvdb35m0O4npuqh1pojlBNDILo9j8AI=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "95487740bb7ac11553445e9249041a6fa4b5eccf",
+        "rev": "1cd63408e71cc0e6a89ff2cb7c4107214e2523cc",
         "type": "github"
       },
       "original": {

flake.nix

@@ -30,9 +30,7 @@
         
         darwinInputs = with pkgs; [
           libiconv
-          darwin.apple_sdk.frameworks.Security
-          darwin.apple_sdk.frameworks.SystemConfiguration
-          darwin.apple_sdk.frameworks.CoreServices
+          apple-sdk
         ];
         
         buildInputs = commonInputs