Implement a project logic datasource
Summary:
Ref T4100. Ref T5595. This allows you to execute all "Projects", "Any Project", "Not in projects" and "include no projects" operations in one field.
It doesn't actually implement such a field yet.
Test Plan: {F375516}
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T5595, T4100
Differential Revision: https://secure.phabricator.com/D12460