Refactor entities+databaseSeeder, implementation DatabaseSeeder OK, app run

.../java/com/projet/projetIndu/bootstrap/DatabaseSeeder.java

...ain/java/com/projet/projetIndu/config/SecurityConfig.java

...va/com/projet/projetIndu/controllers/LoginController.java

.../projet/projetIndu/controllers/MedicalFileController.java

...ava/com/projet/projetIndu/controllers/UserController.java

...n/java/com/projet/projetIndu/dto/UserRegistrationDTO.java

src/main/java/com/projet/projetIndu/entities/Admin.java

...main/java/com/projet/projetIndu/entities/Appointment.java

src/main/java/com/projet/projetIndu/entities/Doctor.java

...java/com/projet/projetIndu/entities/HealthHistorical.java

.../java/com/projet/projetIndu/entities/MedicalDocument.java

...main/java/com/projet/projetIndu/entities/MedicalFile.java

...ain/java/com/projet/projetIndu/entities/Notification.java

src/main/java/com/projet/projetIndu/entities/Patient.java

src/main/java/com/projet/projetIndu/entities/Statistic.java

src/main/java/com/projet/projetIndu/entities/User.java

...a/com/projet/projetIndu/repositories/AdminRepository.java

...projet/projetIndu/repositories/MedicalFileRepository.java

...va/com/projet/projetIndu/repositories/UserRepository.java

.../projet/projetIndu/security/CustomUserDetailsService.java