feat: add ROLE_REPRESENTATION access to admin panel for managing doctors and clinics

- Updated authStore to include 'representation' role.
- Modified DoctorFormPage and DoctorsPage to handle different endpoints based on user role.
- Created new RepresentationActionController for handling doctor and clinic creation by representatives.
- Added new API endpoints for representatives to manage doctors, clinics, and view appointments.
- Updated documentation to reflect new role and API changes.

src/Auth/Controller/AuthController.php

@@ -610,6 +610,7 @@ class AuthController extends BaseController
         if (in_array('ROLE_CLINIC', $roles, true))    return 'clinic';
         if (in_array('ROLE_DOCTOR', $roles, true))    return 'doctor';
         if (in_array('ROLE_SECRETARY', $roles, true)) return 'secretary';
+        if (in_array('ROLE_REPRESENTATION', $roles, true)) return 'representation';
         return 'user';
     }