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/blog.md

@@ -29,7 +29,7 @@ List published blog posts.
       "slug": "ashnayi-ba-bimari-diabat",
       "summary": "خلاصه مطلب...",
       "image": "https://...",
-      "author": { "uuid": "...", "real_name": "دکتر احمدی" },
+      "author": { "uuid": "...", "real_name": "احمدی" },
       "tags": [{ "id": 1, "name": "دیابت" }],
       "status": "published",
       "city": { "id": "123", "name": "یاسوج" },
@@ -84,7 +84,7 @@ Get a single blog post by slug.
     "summary": "خلاصه...",
     "body": "<p>محتوای کامل...</p>",
     "image": "https://...",
-    "author": { "uuid": "...", "real_name": "دکتر احمدی" },
+    "author": { "uuid": "...", "real_name": "احمدی" },
     "tags": [{ "id": 1, "name": "دیابت" }],
     "status": "published",
     "created_at": 1717000000,