Expose `zstd` compress to js code

[secext2022]

zstd (crate) is a dependency of deno, but I want to use zstd compress in js code.

Currently it seems that there is no API for zstd, maybe add this through DecompressionStream ?

[petamoriken]

When zstd support is included in the DecompressionStream spec, it will be implemented in Deno as well.

upstream: whatwg/compression#54