Haskell language support

This might be a bit more of an "out there" language to support, but especially since GHC gained support to emit to the wasm32-wasi target, I think it would be neat to allow Haskell to interop with other languages using the component model.

Seems reasonable to me to add! I'm not aware of any current developers eager to work on this so this is probably more of a "PRs welcome" issue, however.

I’ve started some work here: #979