feat: enhance staff management and payment gateway features

- Fix national code handling in staff creation and updates to support Persian digits.
- Update ClinicStaff entity to allow longer national codes (up to 15 characters).
- Implement support for clinic secretaries in SecretaryController, allowing creation without a doctor UUID.
- Add a new endpoint to retrieve doctors associated with a clinic for secretary management.
- Improve appointment management by ensuring doctors are selectable even when no appointments exist.
- Extend PatientController to allow secretaries to create patient records if they have the appropriate permissions.
- Introduce a PriceInput component for better price formatting in forms, supporting Persian digits.
- Add a MockGateway for testing payment processes without real transactions.
- Enhance SMS settings management with an approval flow for post-visit text messages, including new fields for pending text and status.
- Update migrations to reflect changes in database schema for national codes and SMS settings.

src/Config/Controller/SiteConfigController.php

@@ -20,6 +20,19 @@ class SiteConfigController extends BaseController
         'support_phone',
         'max_cancel_hours_before',
         'appointment_reminder_hours',
+        // payment gateways
+        'payment_test_mode',
+        'mellat_terminal_id',
+        'mellat_username',
+        'mellat_password',
+        'sep_terminal_id',
+        // sms provider
+        'sms_provider',
+        'kavenegar_api_key',
+        'kavenegar_sender',
+        'rangineh_api_key',
+        'rangineh_sender',
+        'sms_price_rials',
     ];
 
     public function __construct(