Upload datasets on Huggingface

[julien-blanchon]

Hey 👋🏻, I started uploading many datasets on huggingface and packaging them with the same format: same README format, provide as much metadata as possible, parquet format with preview, provide the dataset zip on a separate branch ...

I've made a collection with my current dataset + others that are already on huggingface: https://huggingface.co/collections/blanchon/geospatial-datasets-656ddb097c934a7b3c4d4619

I may reupload some datasets already there to keep a consistent format. If people here are interested, we can create an organisation to manage this together.