[Documentation]: Add HERD Tutorial

[stephprince]

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

With HERD being added to PyNWB it would be great to add an additional tutorial about using it PyNWB. There is an existing tutorial on the HDMF docs about how it works, but the PyNWB tutorial would demonstrate how to use HERD within a PyNWB workflow.

See related discussion here: #15 (comment)

@mavaylon1 has begun working on a tutorial here: #1781

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

No.

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