Fixes an issue where Tensorstore would allow reading a slice of size
zero into an empty array buffer, with the result being an array of all
zeros.

Adds more verbose printouts to help with debugging and logging

Adds tests to read 2D frames from a contrived 2D+time OME-Zarr test
image.

Tests include output comparison in MetaImage format to capture metadata
and voxel equivalence.

Adds baseline MetaImage comparisons for HTTP tests at various resolution
levels.

Provides coverage to validate both metadata and voxel agreement with
baseline.

Removes metadata validation from HTTP tests. Both metadata validation
and image buffer validation are now covered under baseline image
comparison after the test body completes.