Add "profile" parameter to JSON-LD exporters

As we worked on #11045 we learned that we can disambiguate JSON-LD exporters by adding a "profile" parameter.

I've already created these pull requests to update external exporters:

• https://github.com/gdcc/exporter-croissant/pull/7
• https://github.com/gdcc/exporter-ro-crate/pull/4

For this issue I'm suggesting that we update the internal JSON-LD exporters...

• OAI_ORE: https://www.openarchives.org/ore/
• schema.org (Schema.org JSON-LD): FIXME - put "profile" URL(s) here

... assuming there is an appropriate "profile" we can add (see FIXMEs above). As this is a backward-incompatible change, it should be documented in a future version of https://guides.dataverse.org/en/6.5/api/changelog.html.

In addition, we should update a future version of https://guides.dataverse.org/en/6.5/developers/metadataexport.html to provide some guidance on how the getMediaType() method can be used to assert the "profile" of JSON-LD exporters.

Start by reviewing issue #11045 and the linked external exporter pull requests, then locate the internal OAI_ORE and Schema.org JSON-LD exporters. Determine appropriate profile URLs for both exporters and how getMediaType() should expose them. Done means the exporters, a future API changelog, and metadata export guidance document the backward-incompatible profile parameter.