R1:dfee1352e98a

Basic structure for MenuItem on Home

Summary: Ref T11957, builds out `/home/menu/` as a basic structure for adding/editing the homepage menu.

Test Plan: visit `/home/menu/` and add items to global and personal. Not wired to anything.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T11957

Differential Revision: https://secure.phabricator.com/D17180