Yolov8n pose tutorial

[Idan-BenAmi]

Pull Request Description:

Add YOLOv8n pose estimation tutorial

Checklist before requesting a review:

• I set the appropriate labels on the pull request.
• I have added/updated the release note draft (if necessary).
• I have updated the documentation to reflect my changes (if necessary).
• All function and files are well documented.
• All function and classes have type hints.
• There is a licenses in all file.
• The function and variable names are informative.
• I have checked for code duplications.
• I have added new unittest (if necessary).

[samuel-wj-chapman]

Only thing that must be changed is the link. Everything else is upto you. Otherwise i am happy