Go accepts GOARCH=wasm32, plus a cgo-without-a-C-toolchain experiment

The proposal to add a 32-bit GOARCH=wasm32 alongside the existing 64-bit wasm target has been accepted, closing a gap that has been open since wasm and GOOS=js landed together back in 2019. In the still-cooking pile, there's also a proposal to gate cgo without a C toolchain behind a cgobindings GOEXPERIMENT, which is the kind of quiet plumbing change that tends to matter more than it sounds. Elsewhere, a short write-up on go fix notes that the tool will happily rewrite calls into third-party code when a library author opts in with a //go:fix inline directive, which is one of those facts worth filing away before it surprises you in a diff.