add CI + regression tests for conversions

[satra]

we should add samples and tests for conversions. it would be good to have some public samples to use in case the linc data remains embargoed. perhaps we could ask each lab for some small samples for testing.

[kabilar]

+1 We should make sure that when creating a dataset the metadata match in the OME-Zarr sidecar json file and .zattrs file.

cc @jingjingwu1225

[calvinchai]

We have added this kind of test in the refactored branch. For now, we used some trivial data like black and white images since the real data is too big. It will make the repo size grow rapidly especially if we want to store both input and output. We can definitely added the real data if we found we need it later.

[balbasty]

Can we close this, or does it need more discussing?

[calvinchai]

I will implement a more throughout test logic using some more real data. We can keep this open before that.