Windows support + Multiple runners boilerplate

[yatima1460]

Hello!

I made a fork and added Windows support + multiple runners

Still needs some fixes like de-registering the runners but spawning seems to work well!

Would be nice to fix it and integrate it with this main project

Maybe with a "os:windows" or "os:linux" input

https://github.com/yatima1460/ec2-multiple-github-runners/tree/windows-experimental