Add Phurl Remarkup

Summary: Ref T9722, Add Phurl Remarkup as ((id)) or ((alias))

Test Plan: Add a comment to any object as ((id)) or ((alias)). Make sure comment renders as a link.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin

Maniphest Tasks: T9722

Differential Revision: https://secure.phabricator.com/D14427