Id was replaced by a composite primary key

feat: creating Quizzes in the DB possible

feat: db reworked for quizzes.

html mutates to jsp step by step. first step

feat: add update for user database entry

fix: post request works in /calculate and Grades was exchanged by ArrayList(Grading), whoop uhm.. whoop!

The AnnotationController handles the database queries

test: adding unit tests for endpoints