WASI-HTTP (component model) support for WebAssembly module

[lcrilly]

Evolve the Wasm language module to support the WASI-HTTP interface so that a Wasm component that imports WASI-HTTP can run natively on Unit.

[ac000]

This is of course an entirely new module...

[ac000]

Current work can be found here.

[tippexs]

Great progress! In the meantime we have published a Docker Image that provides the current state for early testings! I will push documentation to this thread. Please find the image on docker hub:
https://hub.docker.com/r/nginx/unit-preview

To get started with the image pull it

docker pull nginx/unit-preview:wasm-wasi-http

The current implementation of wasm-wasi-http supports Wasm components! Make sure to load it as such. For more information check the README.

[ac000]

I have an initial wasi-http version of luw-echo-request.c