R1:1e3c8df1c89d

Migrate Project names to modular transactions

Summary: Also changes access modifiers on `PhabricatorProjectTransactionEditor` and sets up `storage` for `applyExternalEffects`.

Test Plan: Created new projects, attempted to create without name, with too long of a name, and with a name that conflicts with other projects and observed expected errors.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley

Maniphest Tasks: T12673

Differential Revision…