feat: Windows support

[brian6932]

Depends on https://github.com/jstarks/npiperelay

[darkwater]

Thanks for your interest and efforts, but I'm not really interested in developing this app further. I think it's best if you just maintain your own fork as a successor.

[brian6932]

Fair enough, I was going to do most of these things from cli through ssh, and I found this app really nice and useful. I think there's a place for it, the other solutions/apps I found were quite scuffed. This was my first time touching Dart, but it seems approachable enough, maybe I can implement the rest of the issues I opened.