[Documentation]: Add examples of metadata for optogenetics and icephys devices

[rly]

What would you like changed or added to the documentation and why?

See #1997 (review)

NWB Schema 2.8.0 adds support for a few new Device metadata fields, such as model_name, model_number, and serial_number, in addition to the existing description and manufacturer fields. It would be nice to update the optogenetics and intracellular ephys tutorials to demonstrate the use of these fields with realistic example data. I am not sure what those would be, so we should consult researchers who are collecting these types of data.

Do you have any interest in helping write or edit the documentation?

Yes.

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