We should write BIDS-compatible sidecar JSON's for most of these files. But we need data-generating sites to provide us with proper metadata.

See: https://bids-specification.readthedocs.io/en/stable/modality-specific-files/microscopy.html#microscopy-metadata-sidecar-json

We dhould probably also save info about the data generating site themselves, similar to what's in the MRI sidecars

See: https://bids-specification.readthedocs.io/en/stable/modality-specific-files/magnetic-resonance-imaging-data.html#institution-information