I make sahi support detrex

[wangzhaoyang-508]

by add:

1. https://github.com/wangzhaoyang-508/sahi4detrex/blob/main/demo/inference_for_detrex.ipynb
2. https://github.com/wangzhaoyang-508/sahi4detrex/blob/main/sahi/models/detrex.py
3. detrex/detrex/demo modified:
4. https://github.com/wangzhaoyang-508/sahi4detrex/blob/main/sahi/auto_model.py

[fcakyon]

Hello @wangzhaoyang-508, why did you delete the original readme file?

[wangzhaoyang-508]

Hello @wangzhaoyang-508, why did you delete the original readme file?

Excuse me，this is my first time to have a PR，I hope the new readme file can make my changes clearly。But maybe I am not suppose to modify the Original readme file？