feat: implement BackButton component for consistent navigation

- Added BackButton component to standardize back navigation across pages.
- Integrated BackButton into various pages, replacing custom back buttons for consistency.
- Updated PageHeader to accept backTo prop for displaying BackButton when navigating from subpages.
- Created useGoBack hook to handle navigation logic, determining whether to go back in history or redirect to a fallback page.
- Added tests for BackButton and its integration with PageHeader to ensure expected behavior.

assets/admin/pages/MyPaymentDetailPage.tsx

@@ -127,6 +127,7 @@ export default function MyPaymentDetailPage() {
   return (
     <>
       <PageHeader
+        backTo="/admin/my-payments"
         title="پرداخت‌های ثبت‌شده"
         description="صورتحساب‌های ثبت‌شده‌ی این بیمار"
         breadcrumbs={[