chore: add Claude Code local files to gitignore (#1179)

Add CLAUDE.local.md and settings.local.json to gitignore to prevent
committing Claude Code local configuration files.

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

Co-authored-by: Claude <noreply@anthropic.com>

.gitignore

@@ -15,4 +15,8 @@ yarn-error.log
 
 # for debug or playing
 sandbox
-*.log
+*.log
+
+# Claude Code local files
+CLAUDE.local.md
+settings.local.json