chore: ignore generated iOS/Android directories

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -62,3 +62,7 @@ __pycache__/
 /public/openings/*.json
 /public/wikipedia/*.json
 /public/wikipedia/.initialized
+
+# Capacitor native projects (generated)
+/ios/
+/android/