HCS: add Plate spec

[joshmoore]

Setup:

mkfake my.plate
omero import my.plate.fake`
omero zarr export Plate:1

using ome/omero-cli-zarr#28

Output:

(z) /opt/ome-zarr-py $ome_zarr -vvvvv info /tmp/1.zarr/
DEBUG:ome_zarr.io:/tmp/1.zarr/.zarray does not exist
DEBUG:ome_zarr.reader:treating /private/tmp/1.zarr [zgroup] as Plate
INFO:ome_zarr.reader:root_attr: plate
DEBUG:ome_zarr.reader:{'columns': 1, 'rows': 1}
DEBUG:ome_zarr.io:open(LocalZarrLocation(/private/tmp/1.zarr/PlateAcquisition Name 0/A/1/Field_1))
DEBUG:ome_zarr.io:/private/tmp/1.zarr/PlateAcquisition Name 0/A/1/Field_1/.zgroup does not exist
DEBUG:ome_zarr.io:/private/tmp/1.zarr/PlateAcquisition Name 0/A/1/Field_1/.zattrs does not exist
DEBUG:ome_zarr.reader:treating /private/tmp/1.zarr [zgroup] as ome-zarr
DEBUG:ome_zarr.reader:returning /private/tmp/1.zarr [zgroup]
/private/tmp/1.zarr [zgroup]
 - metadata
   - Plate
 - data
DEBUG:ome_zarr.utils:[]
DEBUG:ome_zarr.reader:returning /private/tmp/1.zarr/PlateAcquisition Name 0/A/1/Field_1 [zarray]
not an ome-zarr: /private/tmp/1.zarr [zgroup]

[joshmoore]

Alternatively, calling viewer.grid_view() lays them out like this:

(original work in napari/napari#565)

Questions I have:

• how to have a plugin trigger the grid view?
• how to customize which field goes where? (metadata?)
• how to allow some spacing between fields?

[will-moore]

Testing this on a 96-well plate (idr0002 with no time data) and just 1 Field per well, I am finding that napari hangs after seeming to load all the data but nothing is displayed.

[will-moore]

Tried again and after a while the idr0002 plate loaded: (local data, no Time-lapse images)
I guess the main issues are:

• takes a long time to load a lot of images (96 well plate), even though they are not visible
• All the channels are shown in one stack - In this case 2 channels per image/field, but for idr0033 it's 5 channels per Field and 384-well Plate
• Channel names don't reflect position. E.g. A1 etc.

This approach might work on small plates

Going to "grid" view, I needed to manually click every layer (192 times!) to turn on every image which gives this view:

[joshmoore]

Closing in favor of gh-57