Spectroscopy notebook: implement query for Euclid

[jkrick]

Does Mock data exist?
When will we get real Euclid spectroscopy in the format and served from the location that users will actually see?

[jkrick]

update from Troy on Oct 3:
"Update on Euclid data availability from IRSA backend mtg today:
Euclid should be sending us a bunch of data in November. IRSA’s planning have our backend services set up to serve it through a private web sever for testing sometime in January. I’m not exactly sure how all the connections work but I think we ought to be able to access it at that point using pyvo or astroquery, though probably will need to be logged in to IPAC VPN or on (e.g.) IRSA science platform to do it."