Add agent builder microservice

[lawndoc]

We're going to need a microservice to build agents so they can get the CA certificates embedded in the executable as datafiles. I am thinking of making a simple REST API on top of webcomics/pywine that can compile Python code into Linux or Windows executables.

I think it'll be a separate repo since it could be useful independent of this project. I'll leave this issue in this repo until the MVP for that microservice is finished.

I could also add darling to the service to produce MacOS builds. That might fall out of scope for an MVP though.