Haskell language support

[aumetra]

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.

[alexcrichton]

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.

[primoly]

I’ve started some work here: #979