Comply with table-specs V1

[tcompa]

Requires:

• Define table specifications #582

Includes:

• Update feature tables as per table specifications, in napari-workflows-wrapper task #593

Ref:

• Define table specifications V1 #529 (comment) (and following comments)

[tcompa]

As per #529 (comment), let's make sure that we remain quite flexible in handling "non-ideal" existing Zarr attributes. Some examples:

• We can infer the type if missing, or we can at least quickly verify it matches with the expectation
• We have a default in-place for missing table-spec version
• ...

[tcompa]

Also (ref #600): if it's useful to have a refactor of the table-related modules, let's have it rather sooner than later.