Make a new page for conference presentations

[JessicaFrank]

Idea to create a new page on the website (maybe under the About tab) that would contain our conference presentation videos, slide decks, + short description.

Blog posts about the conferences are great (and should probably be linked to from the conference description in this new page), but a centralized repository of all our conference presentations would be a great tool for marketing.

This page would allow us to include the videos from our Youtube channel, but also when the presentations are hosted on other sites like the one in https://github.com/freelawproject/fundraising/issues/246

Examples in our space:
https://suffolklitlab.org/talks/
https://www.thelawlabchannel.com/