onnx export

[Noobzm]

hi, can you provide a script to convert your models to onnx format, thanks a lot !

[hnuzhy]

Sorry, I can't get away from my recent work at hand to do this, maybe you can find a suitable solution from the topic about ONNX model conversion in the YOLOv5 and YOLOv8 communities, because the BPJDet I proposed does not change the model architecture extensively.