Initial commit

...xample/grademanager_gui/DegreeModificationController.java

...ain/java/com/example/grademanager_gui/MainController.java

...ample/grademanager_gui/StudentModificationController.java

...ces/com/example/grademanager_gui/degree-modification.fxml

src/main/resources/com/example/grademanager_gui/main.fxml

...es/com/example/grademanager_gui/student-modification.fxml