Implement `node:wasi`

[littledivy]

std/wasi is being deprecated https://github.com/denoland/deno_std/pull/3732 and it would be nice to offer an alternative i.e node:wasi before it's removal.

Some ideas on perfomance:

• https://github.com/littledivy/fastwasi
• https://github.com/denoland/deno_core/pull/289

[rracariu]

Interesting, would this go further and add implementation for WASI preview2? How about supporting wasm32-wasi-threads?

[terrablue]

Are there any plans to implement this? I'm using ruby.wasm in my software, which relies on node:wasi, which means that users who wish to write ruby backend code can't use deno.