Add a RawMessage type that can be used to defer parsing parts of a
payload, similar to the `json.RawMessage` from Go. The implementation
is inspired by `serde_json::RawValue`, which does a similar thing.
When serializing, RawMessage will serialize to a base64-encoded string
if it detects that the data format is human readable (like JSON).
Otherwise it will simply forward the raw bytes to the serializer.
RawMessage has both borrowed and boxed versions. The borrowed version
is the most efficient as it enables zero-copy handling of the input data
but also requires that the input data already contains raw bytes and is
not suitable when dealing with human-readable formats like JSON.
The boxed version is more flexible as it supports byte slices, base64-
encoded strings, and byte sequences but is slightly less efficient as it
requires copying or decoding the input data.
The serde_wormhole crate implements the wormhole wire format as a serde
data format. This will let us replace all the hand-rolled
serialization with auto-generated code, which is less error-prone and
easier to review.
Chirantan Ekbote