TODO.md

TODO document for future work/updates

• https://chromium-review.googlesource.com/c/chromium/src/+/4255409/6..7

- Update header files and conglomerate both into "gen_headers" - @gz83

• https://github.com/Alex313031/thorium-libjxl/pull/13/files

- Add automated .patch generation script - @Alex313031

• TBD