Update PhrictionSearchEngine, implement Projects
Summary: Implements new search engine, projects into Phriction.
Test Plan: Test new search choices, add project to Phriction page. Verify hierarchy still works, setting policy works, etc.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Luke081515.2, Korvin
Maniphest Tasks: T9622
Differential Revision: https://secure.phabricator.com/D14652