Implement support for `wasi-nn`

[Forpee]

Do you guys plan on adding support for wasi-nn?

[Robbepop]

So far there were no plans to add wasi-nn capabilities to Wasmi's experimental WASI implementation. The WASI implementation that exists in Wasmi today was contributed externally and is experimental because it builds on top of Wasmtime's WASI implementation.

The Wasmi project is happily accepting contributions to extend its WASI capabilities. :)