Add example working code to README

[tysonzero]

This library does a good job of documenting the various functionality and providing reasonable types to help guide you, so it's definitely not all that hard to get something working.

With that said the amount of time required to find the necessary chain of function calls required to get something minimal working is fairly non-trivial.

Some incredibly simple MVP similar to what scotty has would be great for people unfamiliar with the library, or people who haven't used it recently.