Add instructions for hidapi for Windows

[banool]

Hey, I'm trying to install this on Windows, but I can't get it to work. It seems like this tool doesn't work on WSL (I figure the necessary sys calls aren't passed properly) and I can't figure out how to install it on native Windows.

I've tried various permutations of this (back slash, forward slash, trailing slash, moving its location, quotes, etc. but it hasn't worked:

PS C:\Users\myuser> set CGO_CFLAGS=-IC:\Users\myuser\.hidapi\include
PS C:\Users\myuser> set CGO_LDFLAGS=-LC:\Users\myuser\.hidapi\x64
PS C:\Users\myuser> go install github.com/kelvie/gbmonctl@latest
# github.com/sstallion/go-hid
go\pkg\mod\github.com\sstallion\go-hid@v0.0.0-20190621001400-1cf4630be9f4\hid.go:38:10: fatal error: hidapi/hidapi.h: No such file or directory
   38 | #include <hidapi/hidapi.h>
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.

[banool]

I tried using the udev rules on WSL to no avail either.

[kelvie]

This tool doesn't support Windows in any way, as the reason this tool exists is that OSD sidekick doesn't work on non-Windows.

I'll leave this ticket open in case someone else wants to chime in and help.