v0.0.2

Other

• silence clippy --all-targets warnings

Added

• Initial round 1: full coverage of the farbfeld spec from
  farbfeld(5). Standalone parser (parse_farbfeld) and encoder
  (encode_farbfeld, encode_farbfeld_from_rgba16,
  encode_farbfeld_image) plus crate-local FarbfeldImage /
  FarbfeldError types.
• Default-on registry Cargo feature wires oxideav-core Decoder /
  Encoder trait impls, codec/container registration, and
  PixelFormat::Rgba64Le mapping. default-features = false builds
  the crate framework-free.
• Container demuxer + muxer + ff / farbfeld extensions + magic
  probe.
• Hard-asserted self-roundtrip + bit-exact byte compare against
  hand-built reference files in tests/roundtrip.rs. Framework
  integration roundtrip in tests/registry.rs.