[API] Fetch quiz questions

[Nefariusek]

As a developer, I want to have a list of questions, so I can use them in the quiz.

Acceptance criteria

Verify, consult and update before starting.

• Random questions are retrieved from the API based on Quiz Settings.
• Data from the response is served as an array of Question objects.

Additional notes

• This functionality should be stored in a separate .js file.
• Use Question class.

[Urszuja]

done.