Implemetation task student

.gitignore

build.gradle

gradle/wrapper/gradle-wrapper.jar

gradle/wrapper/gradle-wrapper.properties

gradlew

gradlew.bat

settings.gradle

...a/id/ac/ui/cs/advprog/tutorial0/Tutorial0Application.java

...ac/ui/cs/advprog/tutorial0/controller/BaseController.java

.../ui/cs/advprog/tutorial0/controller/CourseController.java

...ui/cs/advprog/tutorial0/controller/StudentController.java

...og/tutorial0/exception/DuplicateStudentNameException.java

...main/java/id/ac/ui/cs/advprog/tutorial0/model/Course.java

...ain/java/id/ac/ui/cs/advprog/tutorial0/model/Student.java

.../ui/cs/advprog/tutorial0/repository/CourseRepository.java

...ui/cs/advprog/tutorial0/repository/StudentRepository.java

.../id/ac/ui/cs/advprog/tutorial0/service/CourseService.java

...ac/ui/cs/advprog/tutorial0/service/CourseServiceImpl.java

...id/ac/ui/cs/advprog/tutorial0/service/StudentService.java

...c/ui/cs/advprog/tutorial0/service/StudentServiceImpl.java