[Feature]: Set default identifier to UUID

[rly]

What would you like to see added to PyNWB?

The NWB schema says that the identifier should be unique. https://github.com/NeurodataWithoutBorders/nwb-schema/blob/dev/core/nwb.file.yaml#L27-L31

To simplify the creation of an NWB file, I suggest that we set the default identifier to be str(uuid4()). Users can still customize this if they want.

Is your feature request related to a problem?

No response

What solution would you like?

^

Do you have any interest in helping implement the feature?

Yes.

Code of Conduct

• I agree to follow this project's Code of Conduct
• Have you checked the Contributing document?
• Have you ensured this change was not already requested?

[stephprince]

maybe related to this discussion: #954?

[rly]

Oh. Oops. That's the same issue and a better resolution, because NWBFile already has an object id. Thanks. I propose we make that potentially breaking change in the API in the next major release.