[REFACTOR] Improve handling of question models and dicts

[burtenshaw]

We can improve code quality and reduce redunancy by using a pydnatic type annotator instead of identical methods on each cleas:

@frascuchon gives an example here: argilla-io/argilla-python#195 (comment)

[frascuchon]

@burtenshaw This could be part of a wider issue to align questions to Resource class and finally allow update settings for questions