Skip RLE masks in COCO Importing

[BryonLewis]

related to #1671

This PR will make it so it warns instead of errors when RLE segmentation masks are found in a COCO file.

COCO Support has been updated to do the following:

• Errors if only RLE encoded segmentations are found (we don't have any bboxes associated with detections)
• Will skip RLE encoded segmentations if bounding boxes are along with them
• Will automatically generate a bbox if only polygons are found that are not RLE encoded

Demo Videos for Web and Desktop:

DIVE-20260601-COCO-RLE-Web_small.mp4

DIVE-20260601-COCO-RLE-Desktop.mp4