Note which conferences allow Papers

[ckenst]

1. Make a list of Conferences that accept technical papers
2. Update the list data to provide an option (yes/no)
3. Provide an icon when present

[ckenst]

https://twitter.com/TestConferences/status/1481435274676604928

[ckenst]

Should it be a binary yes? Or should it be a link to something about papers?

Ideally we could do this a few ways with other things like code of conduct, etc.

[ckenst]

Another thing to consider for #802