Fill in / Bucket tool in Annotation toolkit

Feature request: allow fill in using bucket tool for a closed contour shape to facilitate manual annotation process (ex: creating a segmentation mask). There is a limit to smart select or AI assisted annotation, sometimes manual intervention is required. Having a fill in tool will save a lot of time.

I will add that itโ€™s convenient to draw a contour with a brush, then fill the closed loop gap with a bucket tool