Expand gitignore: dmg, app, dSYM, xcarchive, DS_Store, .build

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: macOS26

.gitignore

@@ -5,4 +5,34 @@
 *.xcuserdatad
 
 # Build directory
-AgentXcode/build/
+AgentXcode/build/
+
+# Large binary files
+*.dmg
+*.app
+*.ipa
+*.xcarchive
+*.dSYM
+*.dSYM/
+
+# Swift Package Manager
+.build/
+.swiftpm/
+
+# macOS
+.DS_Store
+
+# Claude
+.claude/
+
+# Swift packages (remote SPM dependencies)
+AgentAccess/
+AgentAudit/
+AgentColorSyntax/
+AgentD1F/
+AgentEventBridges/
+AgentLLM/
+AgentMCP/
+AgentSwift/
+AgentTerminalNeo/
+AgentTools/