v0.10.0

Cross-built Selaenium engine libraries for Linux, macOS, and Windows,
each on x86_64 and arm64. Every binary has a SHA256 checksum.

These are the shared engine libraries used by the language bindings.
Language packages and registry publishing are separate.

All six libraries built successfully. The Linux x86_64 library was
loaded and checked for the complete exported C ABI. This release does
not claim a browser or desktop test pass on every target platform.