jco componentize --wasi-command / --wasi-proxy / --wasi-reactor

[guybedford]

Suggested by @vados-cosmonic it could be useful to have an option for jco componentize to automatically provide a standard WASI world out of the command, proxy and reactor worlds, so that there's no need to configure WITs.

[vados-cosmonic]

Actually suggested by @ricochet , channeled through me into an issue :) should we close the other issue in favor of this one? Or is this more of a shortcut for the general WASI-supported world targeting issue?

[guybedford]

I think that issue is good to track more specifically the wkg tooling wrapping to auto-populate wit data without a local wit folder?