p2p support

[coderedart]

If we want to support editing markerpacks by multiple people at once, we need a way to to communicate peer2peer to avoid server traffic. And p2p brings the problem of sync-ing a pack when multiple people are editing it.

This issue will serve as the place for discussion, while we first get the jokolay 0.2 out.

for consensus algorithm, we have http://thesecretlivesofdata.com/raft/ which allows a bunch of people to get together (party) and edit a marker pack. Even if any of them goes down, the rest of the players can continue being in sync. https://www.freecodecamp.org/news/in-search-of-an-understandable-consensus-algorithm-a-summary-4bc294c97e0d/ is a good resource for a rough overview.