WASM-based process executor

[lthibault]

As the title implies, this is to be an Executor capability for web assembly code. I will update this issue as the task becomes increasingly well-defined. In the meantime, I am beginning with links to useful resources and loosely-structured notes.

General Thoughts

• "WASM on the Server" seems like a very powerful and appealing niche that the Wetware project should investigate
• CGO should be avoided, as it will negate much of the simplicity Wetware currently enjoys (static binaries, cross-compilation, etc), and the performance implications are unclear (despite microbenchmarks from projects such as WASMer).

Useful Links

• Awesome WASM
• Wazero is a pure-go implementation of the WASM runtime with no external dependencies and no CGO. Alpha stability, but dev team appears to be active and in search of early adopters.