Single Rig and Session schemas

[saskiad]

We've discussed the idea of having a single rig and single session schema (as opposed to separate ephys/ophys/behavior schemas for these). There is a lot of shared devices across these rigs and with plans to do experiments that combine modalities, having a single schema makes sense.
One concern I have is that there are devices required for an ephys or ophys rig that would need to be optional in a generic rig. So we might need to lean more into validators to make sure we're still getting the information we need/expect for each modality.

thoughts? @dyf

[dyf]

Cleaning up the discussion board. We're doing this!