Add way to "filter out" low confidence keypoints

[Dref360]

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• I have searched the Supervision issues and found no similar feature requests.

Description

In pose estimation, low confidence keypoints should be set to 0.
It would be great to include this in supervision instead of asking the user to do it.

Proposal:

kpts = KeyPoints(xy=...,
                 confidence=...,)

kpts = kpts.with_threshold(threshold=0.5)

All keypoints with confidence lower than 0.5 would be set to 0.

Use case

Useful when visualizing skeletons with low confidence.

Additional

No response

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!