Organization level project dashboard page

In the pods blueprint we describe how we will eventually need to phase out global pages like /dashboard and instead redirect users to "organization specific pages" like /organizations/bigcompany/dashboard.

This issue is to build a project dashboard page for the organization level.

MVC designs are available at #406613 (closed)

This work should sit behind a generic feature flag that will hide multiple organization dashboard pages.

Implementation plan

See tasks in this issue