chore: sync space with github main 4562287 (v1.1.1)

chore: sync space with github main 4ace42f

chore: sync space with github main dd17146

chore: sync space with github main 35c740a

perf: PNG compress_level 6 instead of optimize/9 (faster pack, ~same size on black-bg pieces)

perf: O(pieces*H*W) -> Theta(H*W) piece extraction via find_objects (103x at 190 pieces)

Deploy Dataset-Maker: torn-page non-overlapping dataset generator