Procedural macros for wolfram-serializer.
Provides #[derive(ToWXF)] and #[derive(FromWXF)] for structs (named,
tuple, unit) and enums. Field-level type pattern matching emits the correct
WXF representation for Vec<u8> (ByteArray), Vec<numeric> and rectangular
nested tuples / fixed-size arrays of numerics (NumericArray), while
everything else delegates through the ToWXF / FromWXF traits.
See the wolfram-serializer crate docs for usage and the wire-format
conventions emitted here.