Automate PRC testing on windows

[d-w-moore]

Find a way to validate that the PRC's functionality ports as completely as possible to Windows, via automatic tests. As much as possible, do this automatically and without changing existing scripts.

Useful tools for this might include:

1. docker compose
2. A docker image that runs Windows environment, maybe: dockurr/windows
3. A scripting shell invoked from the docker windows image, either:
   • PowerShell (this could be hard job, porting the existing BATS/bash scripts), or
   • Git Bash + BATS (probably much easier)