Add a variation for 2 player games with official rules

It would be nice to have a variation for 2 player games following the official rules stated here https://www.catan.com/tournaments-events/catan-stayandplay/catan-for-2-players.

I know we can play 1vs1 games using the same rules used for 3-4 player games, but sometimes it makes the initial phase a little too long/hard/slow, and adding this variation would be a new way to enjoy 2 player games.

Maybe developing this mode would be a little chaotic (as a fellow developer I know these things can be hard), but I think it would be a really good addition for all Catan lovers out there.