GIF compressor engine notices

Gifsicle 1.92: Copyright (C) 1997-2019 Eddie Kohler and contributors.
Distributed under GNU GPL version 2. See GPL-2.0.txt.
https://www.lcdf.org/gifsicle/

Browser adaptation: gifsicle-wasm-browser 1.5.19 by renzhezhilu, MIT.
https://github.com/renzhezhilu/gifsicle-wasm-browser
See WRAPPER-LICENSE.txt.

Build infrastructure: wasm-codecs by Cyril Wanner and contributors, MIT.
https://github.com/cyrilwanner/wasm-codecs

ImgTweak modification, October 7, 2026: extract the package's embedded worker
into a standalone worker.js with a license header. Its compression code is
otherwise unmodified. No warranty.

The separately distributed engine is free software. You may redistribute and
modify it under GPL v2. Corresponding source and build materials are offered
at /gif-compressor/v1/source/README.txt alongside this executable.