Add comprehensive global gitignore configuration

- Add global gitignore with 50+ common patterns
- Include macOS files (.DS_Store, .AppleDouble, etc.)
- Cover editor files (.vscode/, .idea/, *.swp, etc.)
- Handle development files (node_modules/, .env, *.log, etc.)
- Add Python build artifacts and cache files
- Include temporary and backup file patterns
- Add Claude Code settings ignore pattern
- Manage OS-specific files (Windows/macOS)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

modules/git.nix

@@ -7,6 +7,77 @@
     userName = "Yan Lin";
     userEmail = "github@yanlincs.com";
     
+    ignores = [
+      # Claude Code
+      "**/.claude/settings.local.json"
+      
+      # macOS
+      ".DS_Store"
+      ".AppleDouble"
+      ".LSOverride"
+      "Icon"
+      "._*"
+      ".DocumentRevisions-V100"
+      ".fseventsd"
+      ".Spotlight-V100"
+      ".TemporaryItems"
+      ".Trashes"
+      ".VolumeIcon.icns"
+      ".com.apple.timemachine.donotpresent"
+      
+      # Editors
+      ".vscode/"
+      ".idea/"
+      "*.swp"
+      "*.swo"
+      "*~"
+      ".vim/"
+      
+      # Development
+      "node_modules/"
+      ".env"
+      ".env.local"
+      ".env.*.local"
+      "*.log"
+      "npm-debug.log*"
+      "yarn-debug.log*"
+      "yarn-error.log*"
+      
+      # Python
+      "__pycache__/"
+      "*.py[cod]"
+      "*$py.class"
+      ".Python"
+      "build/"
+      "develop-eggs/"
+      "dist/"
+      "downloads/"
+      "eggs/"
+      ".eggs/"
+      "lib/"
+      "lib64/"
+      "parts/"
+      "sdist/"
+      "var/"
+      "wheels/"
+      "*.egg-info/"
+      ".installed.cfg"
+      "*.egg"
+      
+      # Temporary files
+      "*.tmp"
+      "*.temp"
+      "*.bak"
+      "*.backup"
+      "*~"
+      
+      # OS generated files
+      "Thumbs.db"
+      "ehthumbs.db"
+      "Desktop.ini"
+      "$RECYCLE.BIN/"
+    ];
+    
     extraConfig = {
       credential.helper = "";