Let Resin be used as furnace fuel.

Resin in real life is flammable, and I think an "eco-friendly" fuel alternative could be fun, although would need to be balanced to not make coal or wood too overpowered as resin seems to be farmable very easily and requires no processing, it could smelt 4 items per resin, compared to charcoal/coal's 8.

We haven't really had many alternative fuel types in the past, the last one being dried kelp blocks. So I believe making resin a new furnace fuel item could be really fun for the player, and could incentivize the player to collect resin even if they dont want to build with it.