Add an isolated functional testing mechanism

Overview of the feature request

Add a functional testing mechanism for the use cases of the package that helps in the review and QA process of the PRs, so that the use cases can be tested in isolation, without having to depend on other repositories like the dataverse-frontend to prove that the use cases consumption works from a functional perspective.

These tests would help to verify that use cases can be imported with no issues, as stated in this comment: https://github.com/IQSS/dataverse-client-javascript/pull/116#issuecomment-1907711330

What inspired the request?

Retrospective action item.

What existing behavior do you want changed?

None

Any brand new behavior do you want to add to js-dataverse?

None

Any open or closed issues related to this feature request?

None

Inizia esaminando i casi d’uso del package e il commento collegato della pull request relativo alla loro importazione senza problemi. Identifica come il repository esegue attualmente i test e definisci un meccanismo isolato che eserciti il consumo dei casi d’uso senza un altro repository. Il lavoro è completato quando i casi d’uso possono essere testati funzionalmente durante la revisione della pull request e la QA.