truss used to be composed of several protoc plugins, with lots of side
effects.
truss is now composed of one protoc plugin, protoc-gen-truss-protocout
which outputs the output of protoc.
This output, plus the .proto file with the service definition are used
to create a doctree
This doctree is then used by gendocs and gengokit to generate the
microservice and documentation.
This stucture has less side effects, and should be more testable
Adam Ryman