Create a new 3D FPS tutorial for beginners

Features:
- a pre-made blockout level with models and collisions set up
- a player game object with camera

Users will learn how to:
- set up input
- move character in 3D space
- rotate camera
- spawn bullets using factories
- handle bullets collisions without a script (using manager with physics callback listener)
- create enemies with basic AI
- handle collisions of bullets vs enemies