I would like that.
Yes, see https://github.com/Kode/Kha/wiki/khafile.js#advanced
You copied the wrong file.
You need to add the file in the backend for the cs file to be created, like I said. Sources\kha\netsync\Network.hx is only an extern declaration. Also please don't use haxelib with Kha, it can only mess things up.
Just add an empty implementation of the Network class, you can copy it from the Krom backend.
If you are talking about the Kha backend in heaps, I haven't touched that for about two years so I don't think it's still working. But please feel free to fix that.
Don't worry about it. Node's file not found messages are kind of hard to parse, they regularly throw me off for a moment as well.
Well, uhm, read the error message and look for that file it's complaining about.
Doesn't look like it, the Windows SDK seems to be missing. I added a proper error message for that case.