dark forest update

Update for dark forest with brown bears, tree dweller, and the dark forest mini dragon, along with better trees, roaming vindicators, occasional mooshroom spawn, darkweed, and abandoned campsites. the mini dragons would be tamed with sweet berries, tree dwellers would be hostile and drop a useful item, and bears would sometimes shed fur, like turtles, which could be used to make some cool stuff, and would be neutral, like wolves.