Support for zarr zipstore

[iprapas]

In huggingface you can upload zarrs as zipstores and then stream them and read in chunks.

It could be interesting to support zarr zipstores, as this would allow to just upload the dataset on the web and then just stream in firesight

check this huggingface/datasets#4096

[lazarusA]

yes, I have a branch where I did some experiments, still not working.