feat: Refactor code structure and optimize performance across multiple modules

mobile-apps/staff-app/lib/features/profile/faq/domain/entities/faq_entry.dart

@@ -0,0 +1,9 @@
+import 'package:flutter/foundation.dart';
+
+@immutable
+class FaqEntry {
+  const FaqEntry({required this.question, required this.answer});
+
+  final String question;
+  final String answer;
+}