feat: Enhance appointment management by decoupling online booking toggle for admin context

- Introduced management mode for appointment slots, allowing doctors, admins, and clinic managers to view and book slots regardless of the online booking status.
- Updated SlotCalculatorService to accept a management context parameter, bypassing online booking restrictions.
- Modified appointment-related endpoints to handle management context and ensure proper authorization checks.
- Added tests to verify that management users can access slots even when online booking is disabled, while public users are still restricted.
- Improved documentation for API endpoints to reflect new management parameters and behaviors.

assets/admin/components/appointments/ServiceSlotPicker.tsx

@@ -61,7 +61,7 @@ export default function ServiceSlotPicker({
   const slotsQ = useQuery<ApiResponse<any>>({
     queryKey: ['service-slots-picker', doctorUuid, date, serviceUuids, durations, clinicUuid],
     queryFn: () => api.get(
-      `/api/v1/appointment-service-slots?doctor_uuid=${doctorUuid}&date=${date}`
+      `/api/v1/appointment-service-slots?doctor_uuid=${doctorUuid}&date=${date}&management=1`
       + serviceUuids.map(u => `&service_item_uuids[]=${encodeURIComponent(u)}`).join('')
       + durationsQs
       + (clinicUuid ? `&clinic_uuid=${encodeURIComponent(clinicUuid)}` : ''),