Added yolov9 compatibility

[Hamzalopode]

Added Yolov9 compatibility:

• Yolov9 model download for E & C
• Yolov9 process ( same as yolov8 )

Other model size and demo predict will be added with time.

[fcakyon]

Amazing contribution @Hamzalopode! 🚀

Please fix the errors raised in tests by:

• Install required development packages:

pip install -e ."[dev]"

• Reformat with black and isort:

python -m scripts.run_code_style format

• Commit and push 💯

[Hamzalopode]

Thanks @fcakyon !

I think everything looks good now. Let me know if there is anything else.

🚀

[fcakyon]

@Hamzalopode for some reason, you updated all the prior notebook files. Can you please revert these changes?

Other than that all seems OK 🚀

[Hamzalopode]

Done.

Sorry I thought that applying the styling format for the notebooks was a good idea.

[GuillaumeBruand]

@Hamzalopode
Can we add one level of abstraction to integrate common features between yolov8 and yolov9 (see e.g. PR #988)
As far as I know there is full compatibility between the two models.

[Hamzalopode]

Fixed merge conflict between the two branch.