Half precision floats

[modulovalue]

(cc @brendandahl) I noticed that loads and stores for the half precision floats (https://github.com/WebAssembly/half-precision/blob/main/proposals/half-precision/Overview.md) are missing from the proposal https://github.com/WebAssembly/multibyte-array-access/blob/main/proposals/multibyte-array-access/Overview.md#supported-instructions is that intentional?

[brendandahl]

Yes, I don't want to make one depend on the other since they are still in the works. If FP16 is done before this proposal, I'll add it here and vice versa if multibyte ships first.