Create a paginated view for contributors.

GiHub limited the amount of items returned for our contributor API call and offers pagination. At some point we'll have to adopt this in order to show all contributors.

See https://developer.github.com/guides/traversing-with-pagination/

Start by locating the contributor API call and the view that displays contributors, then read GitHub's pagination guide linked in the issue. Implement pagination so the view can retrieve and show all contributors, and verify the complete contributor list is displayed.

Written by the indexing model from the issue text.