Summary: Modernize Project edges to subclass `PhabricatorEdgeType`. Largely based on D11045.
Test Plan: Add a member to a project, saw new rows in the `phabricator_project.edge` and `phabricator_user.edge` tables.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D11111
Summary:
Fixes T2675, T2676.
- when the last person leaves a project it is archived.
- a script to archive all memberless projects
- better feed stories for the various policy edits you can do
- phriction pages are also moved as you rename projects
Test Plan: edited some projects and noted reasonable feed stories. ran script against test data and it worked! left a last man standing project and it archived. renamed a project to "a" then "b" then "a" (etc) and it worked including phrictiondocument moves
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin
Maniphest Tasks: T2676, T2675
Differential Revision: https://secure.phabricator.com/D6478
