Feature Request/Idea: Include Grant ID in "Schema.org JSON-LD" metadata export format

Overview of the Feature Request
The proposal of this feature is to include the grant number in the metadata export format "Schema.org JSON-LD". So far only the funding agency is included in this format (as funder), whereas in others like OpenAIRE the grant number is also given (see Dataverse metadata crosswalk). The idea was shortly mentioned in the Dataverse chat to @pdurbin.
As far as I can see the Schema.org property funding might be quite well-suited for this.

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

What inspired the request?
A comparison of information given via the metadata input fields with the amount of information received from the metadata export formats.

What existing behavior do you want changed?
Expanding the Schema.org JSON-LD metadata export format.

Any open or closed issues related to this feature request?
None found with a search. #4859 might be broadly related.