Initial work on the search feature.

* Created a backend controller & route for order search.
* Created a frontend controller, view, and template for order search.
* Updated the orders model (frontend) to optionally point to the search
route.

* Aside: removed the bin/foreman binstub, which no longer works with
Foreman not in the Gemfile.
Adding in a spec for the application policy, because coverage is sexy.
Added a preliminary search form to the view / template.

* Also fixed the taggable migration so that it uses uuids instead of
integers, otherwise it can't properly match with other objects in the
system.
Merge 74155154-search-offers-v1 to develop

[Delivers #74155154]