Adopt `wkb`

There's no freely-licensed, standalone WKB crate in the georust ecosystem. https://crates.io/crates/wkb exists but is AGPL3. geozero has a WKB parser and encoder, but it presents access as a stream, instead of by random access, which can be harder for downstream packages to use.

I propose that we move https://github.com/kylebarron/wkb into the georust org. It has:

- Reading and write without copying to an intermediate representation, thanks to `geo_traits`.
- Full support for Z, M, and ZM dimension data.
- Full support for little-endian and big-endian data, in both reading and writing.
- MIT and Apache 2 license.

In terms of benchmarks, a simple benchmark showed that it's 2.8x faster than Shapely for reading and 11x faster than Shapely for writing (ref https://github.com/kylebarron/wkb/pull/37 and https://github.com/kylebarron/wkb/pull/38). This isn't a _full_ apples to apples comparison because Shapely is a wrapper of GEOS to Python, but I think for WKB reading and writing the amount of Python overhead should be quite small. So I think it's safe to say this is at least as fast as GEOS, if not faster.