Faces

A face is how an object looks. It is a design that is filled in with each object's own details at the moment it is shown, so one face dresses every object made from a template. A template says which faces its objects may wear, and the `card`, `detail` and `share` variants pick the right one for a list, a full page or a link preview. The preview endpoints draw a face without creating anything, which is how you get a design right before you use it.