/unit_data should include questions

Endpoint: @app.get("/unit_data", response_model=schemas.Unit)

Should include questions. What we see now (example response):

{
    "hidden": false,
    "title": "Databases",
    "date_available": "2022-09-14",
    "course_id": "TDT4101",
    "course_semester": "fall2023",
    "id": 4,
    "reflections": [
        {
            "body": "woop",
            "user_id": "sondralf@ntnu.no",
            "unit_id": 4,
            "question_id": 3,
            "id": 1,
            "timestamp": "2024-02-06"
        },
        {
            "body": "test2",
            "user_id": "sondralf@ntnu.no",
            "unit_id": 4,
            "question_id": 4,
            "id": 2,
            "timestamp": "2024-02-06"
        }
    ]
}

Add to the endpoint:

{
  question: {
    id: "asdasd",
    id2: "asdasdasd"
  }
}