orc_rt_WrapperFunctionResult is a byte-buffer with inline storage and a
builtin error state. It is intended as a general purpose return type for
functions that return a serialized result (e.g. for communication across
ABIs or via IPC/RPC).
orc_rt_WrapperFunctionResult contains a small amount of inline storage,
allowing it to avoid heap-allocation for small return types (e.g. bools,
chars, pointers).
