Multi-volume editions

It would be nice to have a way to link individual volumes of a single work into a record under the work as an edition as well as each volume having individual records. The form as it is now requests information for a single physical volume, so when you have one work split into multiple volumes, it is not possible to specify details accurately, i.e. cover, pagination, identifiers, etc. for each volume.
For example, https://openlibrary.org/works/OL17915213W/Harry_Potter_and_the_Order_of_the_Phoenix_Chapters_24-30

Start with the linked Harry Potter work and inspect how its individual volume records and the edition form currently represent cover, pagination, and identifiers. Define what it means for volumes to remain individual records while also being linked under one work as an edition; done means each volume's details can be recorded accurately and the grouped relationship is represented.

Written by the indexing model from the issue text.