0.5.0

0.5.0 (unreleased)

• Add HDF5Reader (FormatoHDF5): low-level read of any HDF5 file through the shared loader and HDF5Serial: exists, kind(of:), children(of:), attributeNames(of:), attribute(_:of:), datasetInfo, readDataset (hyperslab, as FormatoArray), readStrings. Compound, enum, array and vlen data, references, float16 datasets and attributes of rank 2 or more are refused by name. Pinned exact to h5py 3.16.0 (tools/hdf5-append/generate.py).
• Add HDF5AppendWriter.append(to:mode:body:) with HDF5WriteSession (createGroup, writeDataset with chunk and replace, setAttribute, deleteLink, exists). Default .atomicCopy copies the file, writes the copy and publishes it over the checked original (any failure leaves the original byte-identical); .inPlace is not atomic. Unrelated content is unchanged; h5py reads the appended files equal to base plus operations. No compression filters, resizing or space reclamation. Note: .inPlace replace: true unlinks the old dataset before the new one is written.
• Add TIFFAppImage (FormatoTIFF): the first consumer's reading of one 2D TIFF as a Float32 calibrated image, the named option beside TIFFSignals. Calibration order FEI SEM (PixelWidth on x, where tifffile swaps non-square axes), Velox, Digital Micrograph tags, ImageJ; BigTIFF, extra pages, stacks, compression, tiles, WhiteIsZero, palettes and unequal colour channels are refused by name. Pinned bit for bit to macTEM cb6e164's reader on 149 byte-built files. Known difference: a tag whose value lies outside the file, or of an unknown type, throws truncated here where the consumer ignores it.
• HDF5FileError gains notFound, wrongKind, alreadyExists, invalidPath, unsupportedType, limitExceeded, invalidArgument.

Migration. Source-breaking only for an exhaustive switch over HDF5FileError: add a default case. Otherwise additive. mac4DSTEM can move H5Reader and the sidecar append onto HDF5Reader / HDF5AppendWriter; macTEM's TIFFImageReader becomes TIFFAppImage.read. Float16 attributes are read; float16 datasets are not.