refkv demos

Demos of refkv, reference semantics for key-value storage.

• Image files to Zarr in the browserPaste the URL of a remote image file or store, such as an OME-TIFF, an Akoya QPTIFF, a Zeiss CZI, a DICOM, an N5 or a Sentinel-2 SAFE product: a service worker virtualizes it into a vzip archive in the browser and serves it as plain Zarr, opened here in Neuroglancer or on a map.