Handle multipolygon geoparquet

[gadomski]

[diegoripley]

Hey, thanks for opening this bug, I was just about to open one. If you need a sample dataset, see

https://source.coop/dataforcanada/d4c-datapkg-orthoimagery/archive/ca-qc_government_and_municipalities_of_quebec-2026A000224_d4c-datapkg-orthoimagery_orthorectified_imagery_from_quebec/items.parquet