Add `biahub convert`

[srivarra]

Add a cli command to convert a Zarr V2 / OME-NGFF v0.4 HCS Plate to a Zarr V3 / OME-NGFF v0.5 Plate. From here

I agree that doing conversion using the concatenate CLI is a bit confusing. Do you think it's work creating a convert CLI which is pretty much an alias to concatenate, maybe requiring that you only provide a single zarr store?

Originally posted by @ieivanov in #104 (comment)