v0.0.6

v0.0.6 — irreversible JPEG 2000 (9/7)

• GRIB2 5.40 now decodes both reversible 5/3 and irreversible 9/7: accepts
  qmfbid=0 and QCD scalar-derived/explicit styles (1/2), applies the reference
  decoder's half-LSB tier-1 reconstruction and 0.5*stepsize dequantization,
  then a float32 inverse 9/7 transform
• output matches OpenJPEG sample for sample: fixtures generated via Pillow
  (8/16-bit, 0-3 decomposition levels, odd sizes) plus 82 local codestreams;
  unknown transforms/quantization styles still fail loudly
• lifting is architecture-deterministic: explicit float32 rounding and
  math.Ldexp for the power-of-two step factor; the macOS arm64 CI job that
  caught a one-LSB FMA difference is green again

Verification: go build/vet/test ./... and the wasm suite pass on go1.27.1 with
CGO_ENABLED=0; CI (ubuntu/windows/macos, wasm target, generated files) and
CodeQL are green on this commit. Release assets: gribdump for linux/amd64,
linux/arm64, linux/loong64, windows/amd64 and darwin/arm64.