feat: add benefit history feature with lazy loading and pagination

- Implemented `getBenefitsHistory` method in `HomeRepository` to retrieve paginated benefit history.
- Enhanced `BenefitsOverviewCubit` to manage loading and displaying benefit history.
- Created `BenefitHistoryPage` for full-screen display of benefit history with infinite scroll support.
- Added `BenefitHistoryPreview` widget for expandable history preview in benefit cards.
- Introduced `BenefitHistoryRow` to display individual history records.
- Updated `BenefitsOverviewState` to include history management fields.
- Added new entities and use cases for handling benefit history.
- Created design system documentation for UI patterns and known gaps.

apps/mobile/packages/domain/lib/krow_domain.dart

@@ -72,6 +72,7 @@ export 'src/entities/orders/recent_order.dart';
 
 // Financial & Payroll
 export 'src/entities/benefits/benefit.dart';
+export 'src/entities/benefits/benefit_history.dart';
 export 'src/entities/financial/invoice.dart';
 export 'src/entities/financial/billing_account.dart';
 export 'src/entities/financial/current_bill.dart';