feat(tour): add onboarding tours for various admin pages

- Integrated TourButton component into SettingsMenuPage, SkillsPage, SmsWalletPage, StaffPage, StaffSessionDetailPage, StaffTreatmentSessionsPage, SubscriptionPage, TagsSettingsPage, TreatmentCasesPage to enhance user onboarding experience.
- Created new tour definitions for appointments, clinics, staff management, financial management, and patient management, ensuring comprehensive guidance for users navigating the admin panel.
- Updated documentation to reflect the addition of tours and their implementation details.

assets/admin/pages/DiscountsPage.tsx

@@ -1,5 +1,6 @@
 import SettingsLayout from '../components/layout/SettingsLayout';
 import DiscountTab from '../components/DiscountTab';
+import TourButton from '../components/ui/TourButton';
 
 /** مدیریت تخفیف‌ها — بخش تنظیمات برای تعریف قوانین تخفیف عمومی (owner-scoped). */
 export default function DiscountsPage() {
@@ -9,8 +10,11 @@ export default function DiscountsPage() {
         style={{ background: 'var(--surface)', minWidth: 0 }}
         className="px-4 py-4 md:px-6 md:py-6 rounded-[var(--r-lg)]"
       >
-        <h1 className="section-title" style={{ marginBottom: 16 }}>مدیریت تخفیف‌ها</h1>
-        <DiscountTab />
+        <div style={{ display: 'flex', alignItems: 'center', gap: 4, marginBottom: 16 }} data-tour="page-title">
+          <h1 className="section-title">مدیریت تخفیف‌ها</h1>
+          <TourButton tourId="discounts" ready />
+        </div>
+        <div data-tour="discounts-rules"><DiscountTab /></div>
       </div>
     </SettingsLayout>
   );