New notebooks example case: MolSSI learning content

[MatiasJJ]

https://github.com/MolSSI-Education/acs-2023-notebooks

Could use these also in the intro/motivation

[MatiasJJ]

Maybe mention GitHub CodeSpaces that support notebooks

[MatiasJJ]

Anyhow this is not critical so maybe leave out for now

[bast]

This is a very nice resource that we should re-use but I will not add it here this time.