Merge branch 'master' into 'main'

...mple/gestionstagesbackend/controllers/AuthController.java

...e/gestionstagesbackend/controllers/StudentController.java

.../java/com/example/gestionstagesbackend/model/Student.java

...ain/java/com/example/gestionstagesbackend/model/User.java

.../gestionstagesbackend/repositories/StudentRepository.java

...ple/gestionstagesbackend/repositories/UserRepository.java

...example/gestionstagesbackend/services/StudentService.java

...om/example/gestionstagesbackend/services/UserService.java