MLX support

[robmarkcole]

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• I have searched the RF-DETR issues and found no similar feature requests.

Description

https://github.com/thewebAI/yolo-mlx showed this is possible for yolo26, and MLX support would release Apple users from needing NVIDIA access

Use case

No response

Additional

No response

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!

[Borda]

we have this open #767 just need to figure out how best to fit it to the package/repo