Premade fps and 3rd person pov camera setup

[cktang88]

Would be super helpful to have premade first person and third person pov wasd + mouse movement for a cube, basically every game needs it, and from personal experience it's tricky to get right.

[regenrek]

Hi, I'm working on a small rewrite for the boilerplate. After that we can get some basics features in (like Debug View, Basic Controls, Cameras)