chore: Add Claude Code settings to .gitignore

- Add .claude/settings.local.json to gitignore
- Prevents local IDE configuration from being committed
- Keeps personal development settings private

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

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

.gitignore

@@ -44,3 +44,4 @@ flagged/
 # OS
 .DS_Store
 Thumbs.db
+.claude/settings.local.json