Summary:
Related diff [Litho]: D23243009
This diff adds support for a protocol for layout messages where the type is recursively encoded as:
```
{
kind: "type",
data: ???
}
```
We check if the message adheres to the new encoding, otherwise we fall back to the old behavior. If it's the new encoding, the message is traversed recursively flattening the types to EditorValue using the type hints provided.
Reviewed By: Andrey-Mishanin
Differential Revision: D23319619
fbshipit-source-id: 79e8886f8f5a0aea4ec32938f1d5cd2fd645a297
d488b308de