Summary: Ref T13275. Add portals to the search index so that: - they show up in fulltext global search; and - the typeahead actually uses an index. Also make them taggable with projects as an organizational aid. Test Plan: Indexed portals with `bin/serach index`, searched for a portal with "Query", with fulltext search in main menu, with typehead on "Install Dashboard...", changed the name of a portal and searched again to check that the index updates properly. Reviewers: amckinley Reviewed By: amckinley Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam Maniphest Tasks: T13275 Differential Revision: https://secure.phabricator.com/D20389