Create an endpoint to retrieve the file citation

[MellyGray]

Overview of the Feature Request
Create an endpoint to retrieve file citation. This endpoint will be the equivalent to the existing one for retrieving dataset citation but for the file citation

Note that the citation may include HTML elements, such as an anchor with a link, e.g., Finch, Fiona, 2024, "Darwin's Finches", <a href="https://doi.org/10.5072/FK2/GNCFOD" target="_blank">https://doi.org/10.5072/FK2/GNCFOD</a>, Root, DRAFT VERSION; blob [fileName].

Also, please review this PR conversation about the composition of the citation: IQSS/dataverse-frontend#269 (comment).

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

What inspired the request?

• 261 - Add File Citation to File Page dataverse-frontend#269 (comment)
• Set up the boilerplate for the File Page dataverse-frontend#249

What existing behavior do you want changed?
None

Any brand new behavior do you want to add to Dataverse?
Add new endpoint to the API to retrieve the file citation

Any open or closed issues related to this feature request?

Issue to add the endpoint to get the dataset citation:

• [Spike - API] - Extend Dataset API endpoints to support the Dataset page (SPA) #9588

Also related:

• Cite Data: Various formats of citation are not accessable via URL #3140
• DOIs for files (PIDs for files) #4350
• [Spike - API] Extend the Native API to support dataset and datafile citation export #9994