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.

docs/api/patient.md

@@ -5,7 +5,7 @@
 Patient records track patients per entity (doctor or clinic). Each record holds multiple sessions (visits). Access requires an active subscription with the `patient_records` feature.
 
 **Base path:** `/api/v1`  
-**Auth:** Bearer JWT (doctor or clinic role required)
+**Auth:** Bearer JWT (doctor, clinic, or secretary with `appointments.view` permission required)
 
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