Support for Zarr #343
Description
We have user contributed real Zarr data now, courtesy of @FlynnOConnell, seen at https://dandiarchive.org/dandiset/001546
They have successfully run Neuroglancer on their underlying data object (since it is microscopy) but it would be great if they could open the basic file contents via Neurosift as well
The performance and ease of use of Zarr via NeuroConv is also likely to start us to encourage using this backend more and so should become more common over time