Create a new 3D FPS tutorial for beginners

[paweljarosz]

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