Recognize "#project" as a formal object name
Summary: Ref T4264. Ref T4262. Ref T2628. Ref T3190. To write Herald object rules which bind to a project, I want to take the low budget approach and have the user just type `#project` into a text field. Formally recognize `#project` as an object name, by moving all the existing stuff from the remarkup rule to the PHID type declaration.
Test Plan: Typed `#project` into jump nav and `phid.lookup` in Conduit. Typed `#project` into Remarkup.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T3190, T4264, T2628, T4262
Differential Revision: https://secure.phabricator.com/D7882