Update README for flattened single-split structure with inline segmentation

Remove obsolete loose images/segmentations/metadata/splits (flattened into data/train parquet)

Flatten C: single train split, embedded images + inline segmentation polygons, remove splits

Add 8067 cystoscopy images (part 14)

Add 8067 cystoscopy images (part 13)

Add 8067 cystoscopy images (part 12)

Add 8067 cystoscopy images (part 11)

Add 8067 cystoscopy images (part 10)

Add 8067 cystoscopy images (part 9)

Add 8067 cystoscopy images (part 8)

Add 8067 cystoscopy images (part 7)

Add 8067 cystoscopy images (part 6)

Add 8067 cystoscopy images (part 5)

Add 8067 cystoscopy images (part 4)

Add 8067 cystoscopy images (part 3)

Add 8067 cystoscopy images (part 2)

Add 8067 cystoscopy images

Add metadata, splits, stripped segmentations, dictionary, LICENSE, and dataset card (part 4)

Add metadata, splits, stripped segmentations, dictionary, LICENSE, and dataset card (part 3)

Add metadata, splits, stripped segmentations, dictionary, LICENSE, and dataset card (part 2)

Add metadata, splits, stripped segmentations, dictionary, LICENSE, and dataset card

initial commit