Integrate font release builds with type.world

Look into setting up tooling such that `fontship publish` or similar can publish fonts build from release tags directly to [Type.World](https://type.world/), including from CI.

* [GitHub Project](https://github.com/typeworld/typeworld)
* [Developer docs](https://type.world/developer/)
* [API docs](https://github.com/typeworld/typeworld/tree/master/Lib/typeworld/api)