Use bioformats2raw to convert zarr images to ome-zarr

[manzt]

Now that we can support the outputs of bioformats2raw, we should use that tool to generate our zarr-based image pyramids. However, bioformats does not create the omero metadata which we'd like to use to specify how to render our images. They've put a lot of thought into what this information should look like, and I think we should replicate for our purposes. We can include this both in the source itself for zarr as well as in the image metadata in raster.json.

https://github.com/ome/omero-ms-zarr/blob/master/spec.md

"id": 1,                              # ID in OMERO
"name": "example.tif",                # Name as shown in the UI
"channels": [                         # Array matching the c dimension size
    {
        "active": true,
        "coefficient": 1,
        "color": "0000FF",
        "family": "linear",
        "inverted": false,
        "label": "LaminB1",
        "window": {
            "end": 1500,
            "max": 65535,
            "min": 0,
            "start": 0
        }
    }
],
"rdefs": {
    "defaultT": 0,                    # First timepoint to show the user
    "defaultZ": 118,                  # First Z section to show the user
    "model": "color"                  # "color" or "greyscale"
}