Rust implementation of Draco geometry encoding and decoding.
draco-core: bitstream and geometry codec.draco-io: OBJ, PLY, FBX plus low-level GLB/resource/accessor contracts.draco-gltf: lossless glTF 2.0 and pinned 2.1-draft documents, packed-geometry read/write APIs, Draco and GLB v2/v3 output.
Full glTF applications should depend on draco-gltf; draco-io intentionally
does not expose a glTF scene API.