* feat: Add soft Non-Max suppression * feat(nms): add vectorized Gaussian Soft-NMS box/mask primitives * feat(core): add Detections.with_soft_nms * feat: export soft-NMS functions from top-level supervision API * docs: add soft-NMS entries to IoU/NMS utils page * test: add Soft-NMS coverage for box/mask primitives and Detections API --------- Co-authored-by: jirka <6035284+Borda@users.noreply.github.com> Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>