Native API: ability to filter dataverse collection contents by type

Overview of the Feature Request
Add a type parameter to the /api/dataverses/$ID/contents command (see https://guides.dataverse.org/en/latest/api/native-api.html#show-contents-of-a-dataverse-collection)

What kind of user is the feature intended for?
API User

What inspired the request?
Need to retrieve a list of the sub-collections of a dataverse collection (would spare the users from doing the filtering themselves after retrieval of the contents)

Any brand new behavior do you want to add to Dataverse?
Add a parameter to the dataverse collection endpoint (Native API)

Any open or closed issues related to this feature request?

Other issue on contents :

• #7648

Are you thinking about creating a pull request for this feature?
Possibly, but not before the last trimester of 2024

Start with the Native API documentation for the /api/dataverses/$ID/contents endpoint and review related issue #7648. Trace the endpoint implementation and its tests, then support omitted, single, and repeated type parameters for dataverses, datasets, and files. Done means the endpoint returns only the requested content types while preserving all types when the parameter is omitted.