[PolygonZone] - allow per class counting

[karanjakhar]

Description

Resolves #791

Type of change

• [x] New feature (non-breaking change which adds functionality)

How has this change been tested, please provide a testcase or example of how you tested the change?

https://colab.research.google.com/drive/1RQqqMvQfyWv4fYg5vUVJfK_xt8lSQ5PQ?usp=sharing

[SkalskiP]

Hi @karanjakhar 👋🏻 Thanks a lot for your interest in Supervision! I see you implemented the current class_in_count and class_out_count. In my task, I mainly meant total counts. What you create is also helpful and valuable.

Would you be willing to extend the logic and implement class_in_current_count, class_out_current_count, class_in_total_count, and class_out_total_count?

[karanjakhar]

@SkalskiP Yes. I will add that also.

[SkalskiP]

Awesome! Let me know once you'll be ready for review.

[karanjakhar]

Hi @SkalskiP , I have made the changes. Please review.

[karanjakhar]

Hi @SkalskiP I have added tests also for PolygonZone. Please review.