R1:8b4398f9167f

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