Create Forest boss scene for first encounter

* ~~Pillars/rocks in the room can be destroyed~~
* ~~Boss spawns on a pedastal~~
* ~~Rocks fall behind you trapping you in the room when you enter the room~~
* ~~Pause player movement and pan camera to boss~~
* ~~Return camera to player and rockslide triggers~~
* ~~Boss jumps into the center when you enter the room~~
* ~~Rocks are destroyed (perhaps by the boss' hammer?) when you exit the room~~