Update show method to indicate the current object/file extension of the underlying image

[alexg9010]

Given that Image Array will support many file types via Bioformats it could be helpful to indicate which underlying file is currently being displayed.

It could be as simple as an additional text label as part of the show method:

> object
ImageArray Object (c,x,y) [ZarrArray]
Scales (2): (3,768,512) (3,384,256)
...
> object
ImageArray Object (c,x,y) [HDF5Array]
Scales (2): (3,768,512) (3,384,256)
...
> object
ImageArray Object (c,x,y) [BFArray, .ome.tiff]
Scales (2): (3,768,512) (3,384,256)

This can be derived from the objects using class() and path() methods.

[alexg9010]

This maybe extended to show versions of specifications especially for zarr (v2,v3).