ConvertHEIC software notices

HEIC encoding uses libheif 1.23.7 (LGPL-3.0) and Kvazaar 2.3.2 (BSD-3-Clause).
libheif commit: 12a259a5882dd99d45ec5fc77e296a3b620d1e2e
Kvazaar commit: 6040962bed5cc68c5ad01234c38c08b8b2822068
The separately loaded WebAssembly module does not include x265.

Library license texts:
/codecs/heic/COPYING
/codecs/heic/LICENSE

Corresponding source, including modifications and the exact build recipe:
/codecs/heic/corresponding-source.tar.gz

The module can be rebuilt with the included encoder.cpp and build.sh using
emscripten/emsdk:4.0.19 and CMake 3.31.6. The libheif and Kvazaar libraries
can be modified and recombined with the included wrapper. The separate
heic-encoder.mjs and heic-encoder.wasm files are the replacement interface.
Reverse engineering for debugging modifications to LGPL-covered portions
is permitted. The libraries are provided without warranty; see their licenses.

Other newly bundled components:
gifenc (MIT): /licenses/gifenc-MIT.txt
UTIF.js (MIT): /licenses/utif-MIT.txt
Mediabunny (MPL-2.0): /licenses/mediabunny-MPL-2.0.txt
PDF.js (Apache-2.0): /licenses/pdfjs-Apache-2.0.txt
ONNX Runtime Web (MIT), Copyright Microsoft Corporation:
/licenses/onnxruntime-MIT.txt
U-2-Net / U2NETP model (Apache-2.0): /models/u2netp/LICENSE.txt
Model provenance and checksum: /models/u2netp/manifest.json

Mediabunny is used without source modifications. Corresponding upstream source:
https://github.com/Vanilagy/mediabunny/tree/v1.64.0

Third-party instructional screenshots remain the property of their respective
owners and are attributed beside each illustration. Original sample-file
artwork has its own license at /samples/heic/LICENSE.txt. That license does
not apply to Apple or Dropbox interface screenshots.