Test and describe RO-Crate support in Guides

[pdurbin]

As discussed with @cmbz today #10086 has been closed but I intend to follow up on the plan I laid out wherein I test the remaining two RO-Crate implementations...

• https://github.com/gdcc/exporter-ro-crate by @okaradeniz
• https://github.com/gdcc/exporter-transformer/tree/main/examples/arp-ro-crate by @ErykKul

... and then write up something for the guides to explain what RO-Crate support Dataverse offers (exporting metadata in RO-Crate format).

[pdurbin]

I hit a bug while testing the exporter by @okaradeniz but he got back to me right away in Zulip that he knows about it and will take a look. (Thanks!) I'll go ahead and assign him to this issue to remind us that there's something to address.

[pdurbin]

I just created this PR and explained what I tested there:

• 10796