• I'd be willing to implement this feature (contributing guide)

Describe the user story
Some packages (SWC, sharp, @napi-rs/canvas) publish native packages for both glibc and musl. At the moment users need to install both versions, as there is no conditional differentiator as for os and cpu.

Currently yarn 3.2+ and cnpm have implemented the libc field, the npm implementation is still under discussion.