Support HDF5 datasets

[lhoestq]

Can we add h5py as a dependency to the viewer workers ? It's a pretty common dependency for vision datasets since it allows to read hdf5 files which is common in this field (used by 180k+ repos on github)

related to https://huggingface.co/datasets/sayakpaul/nyu_depth_v2/discussions/5#638a1d4dc7f3cc0d220ea643

cc @severo

[severo]

It's already installed:

https://github.com/huggingface/datasets-server/blob/080da2efe810cccb401886f6c24e013ce20344af/workers/datasets_based/poetry.lock#L672-L678

[lhoestq]

❤️