[Spike - API] [1/2] Extend the Files API to support frontend files tab display data

[GPortas]

Overview of the Feature Request

The logic to implement will only support the display logic of the files tab when accessing the dataset page, without supporting filtering or other tab actions, which will be developed in upcoming spike issues.

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

What inspired the request?

• [Spike - Backend] [1/2] Create the File Tab of the Dataset page - Display data dataverse-frontend#122

What existing behavior do you want changed?
N/A

Any brand new behavior do you want to add to Dataverse?
Extend Files API

Any open or closed issues related to this feature request?

• [Spike - Backend] [1/2] Create the File Tab of the Dataset page - Display data dataverse-frontend#122