Create mobile client quiz routes

[romanobro56]

Create api routes for accessing QuizItem objects from the database. There exist some services already in apps/backend/service.ts you can use, update or look to create your own.

ideas for routes:

router.get("/quiz/:id", getQuizItemById as any) // GET method returning quiz item by id
router.get("/quiz/:topic", getQuizItemByTopic as any) // GET method returning quiz item by topic

and more possibly ...