Refactor doctor name handling across the application

- Removed the "دکتر" prefix from doctor names in various components and API responses to ensure consistency and clarity.
- Updated the AppointmentDetailPage, CommentsPage, DashboardPage, RatingsPage, SecretariesPage, and other relevant files to reflect the changes in doctor name formatting.
- Adjusted API documentation to align with the new naming conventions.
- Implemented validation to prevent the creation of clinics without a name and restricted users to a single clinic.
- Added tests to verify that doctor names are stored without titles and that clinic creation adheres to the new validation rules.

docs/api/clinic-invitation.md

@@ -34,7 +34,7 @@ Send an invitation to a doctor (by mobile number) to join a clinic.
 ```json
 {
   "mobile": "09123456789",
-  "name": "دکتر علی احمدی",
+  "name": "علی احمدی",
   "specialty": "قلب و عروق"
 }
 ```
@@ -58,7 +58,7 @@ Send an invitation to a doctor (by mobile number) to join a clinic.
     "invited_at": 1717000000,
     "expires_at": 1717259200,
     "token_used": false,
-    "doctor": { "uuid": "...", "name": "دکتر علی احمدی" },
+    "doctor": { "uuid": "...", "name": "علی احمدی" },
     "clinic": { "uuid": "...", "name": "کلینیک الوند" }
   }
 }