Add WASI Interface to Wasmer

[syrusakbary]

WASI is a WebAssembly System Interface.

Here's a detailed blogpost from Mozilla about it: https://hacks.mozilla.org/2019/03/standardizing-wasi-a-webassembly-system-interface/

Wasmer should support WASI, in a similar way we support emscripten.
So binaries/libraries can be executed with wasmer easily.

Related issues

Rust is also trying to target wasi from rust libraries: rust-lang/rust#59464

Related docs

WASI API: https://github.com/CraneStation/wasmtime-wasi/blob/wasi/docs/WASI-api.md

[syrusakbary]

We just merged #299 which adds initial (and experimental) support for WASI 🎉

We will keep iterating on the WASI integration, so keeping this issue open until is feature complete

[jedisct1]

Wasmer's support for WASI is pretty decent already!

You should ask to be listed here https://wasi.dev

[syrusakbary]

Thanks for the ping!

We will need to submit PRs to the following repos:

• https://github.com/cranestation/wasi
• https://github.com/CraneStation/wasi.dev

@Hywan do you want to handle this? :)

[syrusakbary]

I've created the issue in the wasi.dev repo adding Wasmer: bytecodealliance/wasi.dev#2

Closing the issue here since Wasmer WASI support is stable and mature now.

Thanks everyone for your support!