Switch ome_zarr class from S3 to S4

[Bisaloo]

Modelled after the class currently in spatialdataR.

This currently fails tests because I removed the [ method to not clash with what S4Vectors does.

We have two options:

• use [ to extract levels and a crop() method to slice/crop image (S4Vectors + ImageArray strategy)
• use [ to crop/slice and a extract_levels() method to extract levels. This is what we're doing on main.

@Artur-man, what do you think?

[Artur-man]

I also wanted to separate the class from spatialdataR and make its own package, I think romeo might as well serve that purpose.

I do not know about SimpleList much but it comes with its own metadata right ? thats really convenient.

What you mean by "to not clash with what S4Vectors does", is that [ behaves differently for each SimpleList level ? that I did not understand.

[Artur-man]

Ah by the way:

use [ to extract levels and a crop() method to slice/crop image (S4Vectors + ImageArray strategy)

I think in ImageArray, I use [[ method to extract levels (although we do not use the extract_levels method) but use [ for cropping where [ methods calls crop.