Add windows arm64 build

[Julusian]

Would it be possible to get a windows arm64 build added?
It appears that microsoft is doing another push for arm64 laptops, having support for them would be great.

I suspect it may be a bit fiddly, as nodejs 20 was the first to officially support it. Chrome has supported it for a few months (https://blog.google/products/chrome/download-google-chrome-windows-pc-arm/), so hopefully that means that building skia itself may not be too painful