FR: Windows ARM binaries

[jennings]

Is your feature request related to a problem? Please describe.
So-called "Copilot+ PCs" are ARM machines. They are probably going to become more common, so we should publish Windows ARM binaries.

Additional context
I have no idea if this is a lot of work or almost none. I wanted to get this into a FR before I forget.

[ilyagr]

I ran jj on Windows arm (it's the easiest way to virtualize Windows on a Mac), and I think the Intel binary worked OK via Windows' analogue of Rosetta.

We could still publish a binary, though. Also, I didn't test the x64 binary extensively, there could be subtle issues.

[jennings]

Good to know! Somehow I completely forgot when I filed this issue that there's an emulation layer for running x64 binaries on ARM.

[ilyagr]

Related: on Discord, there was a request for https://www.visualjj.com/ AKA https://marketplace.visualstudio.com/items?itemName=visualjj.visualjj compiled for Windows ARM. While I think there's a good chance it's possible for the author to implement it without us providing a Windows ARM jj binary, it would no doubt be easier if we researched a good way of building one and tested it in CI.