IIIF Explorer Component returns multiple partOf for context

[tomcrane]

This could be a config for default behaviour, or a checkbox in the UI, or both.

When returning a content state the Explorer can return a partOf...partOf route to show the manifest/collection the selected resource came from.

It could also do this when the returned object is an Image Service or other non-content state resource.

This would allow (e.g.) Delft exhibitions to automatically have knowledge of the containing collections / works / etc, without the content-creator user having to manually include this information.