chore: ignore local Claude settings (#5557)

Add .claude/settings.local.json to .gitignore to prevent committing
local Claude Code configuration.

Author: philipphofmann

.gitignore

@@ -97,3 +97,6 @@ swiftlint/*
 
 # Sample app
 samples/*/.env
+
+# Local Claude Code settings that should not be committed
+.claude/settings.local.json