Add user guides for clinic management roles in Persian

- Create README.md for user guides covering roles: independent doctor, clinic owner, clinic manager, secretary, and staff.
- Add detailed step-by-step guides for setting up and managing clinics for clinic managers and clinic owners.
- Include instructions for independent doctors on setting up their practice.
- Provide a comprehensive guide for secretaries on daily operations and patient management.
- Introduce staff guide for nurses and technicians on session management.

.gitignore

@@ -59,3 +59,6 @@ clinicpro/*
 # Database backups (never commit dumps to the repo)
 *.sql
 *.sql.gz
+
+# اسکرین‌شات‌های راهنمای کاربری — با guide-shots.mjs بازتولید می‌شوند و ۱۷ مگابایت‌اند
+docs/guide/images/