Create endpoint for architecture council members for council page migration

As defined in eclipsefdn/it/websites/eclipse.org#549 (comment 2340108), to retain the council page at eclipse.org/org/foundation/council, a new endpoint is needed. This endpoint will read in data from the People, PeopleRelations, PeopleProject, Organization, and OrganizationContact tables (see https://git.eclipse.org/c/www.eclipse.org/org.git/tree/foundation/council.php).

Due to complexity, we'll likely need to precache this entire fetch as it will be an expensive calculation, likely taking at least a few seconds to calculate which would be detrimental to the user experience.