MLX LM has moved!

[awni]

MLX LM has moved to a new repo. We will be removing it soon from the examples here as it is now a standalone repo and python package.

• For new issues and discussions related to MLX LM please open them in the new repo.
• For new features / PRs, fork and develop on the new repo as soon as possible to avoid diverging.
• For existing PRs that you would like to move, the simplest approach is likely to fork the new repo and manually apply the changes (cp -r old_repo/llms/mlx_lm new_repo/mlx_lm) should work reasonably well. For more complex diffs for which this doesn't work let us know here or in the PR and we will work with you on moving it.