Add Windows support

[mardukbp]

Useful references:

https://github.com/mattn/go-tty/blob/master/tty_windows.go

https://github.com/wez/wezterm/blob/master/termwiz/src/terminal/windows.rs

https://github.com/rschmitt/heatseeker/blob/master/src/screen/windows.rs

This would enable using term in micro on Windows!