Images from spatialdata 0.6 don't load - zarr tries to call PUT methods in openGroup

[xinaesthete]

This seems to be at the viv level (and the way it calls zarrita), so I'll open an issue/PR there.

It may be possible to work-around by re-implementing loadOmeZarr locally - that might be what I do initially to figure out what change will be needed in viv.

With #15 test-fixtures available locally, using http://localhost:8080/v0.5.0/blobs.zarr in the demo UI it is able to display images, but http://localhost:8080/v0.6.1/blobs.zarr has errors where it tries to "PUT" data on a store that should be readonly.

hooks.ts:103   Uncaught (in promise) TypeError: Failed to fetch
    at HTTPStore.setItem (httpStore.ts:66:27)
    at initGroupMetadata (index.ts:100:17)
    at async initGroup (index.ts:109:5)
    at async openGroup (hierarchy.ts:301:13)
    at async loadMultiscales (index.mjs:1075:15)
    at async load (index.mjs:1252:39)
    at async createLoader (utils.ts:191:21)
    at async changeLoader (hooks.ts:60:31)

viv stack:

setItem @ httpStore.ts:66
initGroupMetadata @ index.ts:100
await in initGroupMetadata
initGroup @ index.ts:109
await in initGroup
openGroup @ hierarchy.ts:301
await in openGroup
loadMultiscales @ index.mjs:1075
load @ index.mjs:1252
loadOmeZarr @ index.mjs:1293
createLoader @ utils.ts:191
changeLoader @ hooks.ts:60
(anonymous) @ hooks.ts:104