Upload tool for XOR and compression of model deltas.

[umbra-scientia]

Added a Python script under scripts/xor-codec/xor_codec.py for encoding and decoding model weight deltas. (With optional gzip compression.)

Encode: xor_codec.py output_dir/ model_dir/ llama_dir/ --encode --compress

Decode: xor_codec.py output_dir/ delta_dir/ llama_dir/ --compress

[github-actions[bot]]

:x: pre-commit failed. Please run pre-commit run --all-files locally and commit the changes. Find more information in the repository's CONTRIBUTING.md

[andreaskoepf]

@olliestanley could you push to this branch the latest version?

[github-actions[bot]]

:x: pre-commit failed. Please run pre-commit run --all-files locally and commit the changes. Find more information in the repository's CONTRIBUTING.md

[olliestanley]

Oh no, this has suffered from the history messing up due to main -> main merge. I will close and start a new PR with Mick listed co-author