Mark UIExamples as a prototype
Summary: Ref T9103. This application is only useful for developing Phabricator, and in general is not kept "production ready". Mark it as a prototype.
Test Plan: visit /applications/, see it marked as prototype.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T9103
Differential Revision: https://secure.phabricator.com/D13822