[Bug]Support YOLOv8-cls

[wjj19950828]

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Do follow contribution

• Support YOLOv8-cls
• soloved YOLOv8 Paddle export error: IndexError: list assignment index out of range #948

[glenn-jocher]

@wjj19950828 thank you for working on this! Let me know if you need any help from the YOLOv8 team.

[glenn-jocher]

@wjj19950828 hi there! Could you provide a status on this?

I'd really like to enable Paddle export for YOLOv8. It's one of the only export format that's causing errors for us still:
https://github.com/ultralytics/ultralytics/actions/runs/4537845907/jobs/7996127140

[wjj19950828]

@glenn-jocher hi～Sorry for the late reply, currently X2Paddle has released version 1.4.1, and verified that YOLOv8 cls/det/seg are all supported, thanks for the feedback~

The following commands are all supported

yolo export model=yolov8n.pt format=paddle
yolo export model=yolov8n-cls.pt format=paddle
yolo export model=yolov8n-seg.pt format=paddle

Looking forward to more cooperation~

[glenn-jocher]

@wjj19950828 it's great to hear that X2Paddle has released version 1.4.1 and supports YOLOv8 export to the various cls/det/seg tasks! Thank you for the bug fix, I will update our code to allow X2Paddle export to all these formats now :)

[glenn-jocher]

@wjj19950828 I confirm it works now!