Add basic lighting to 3D shapes demo

[Samispeedfire]

As of right now, the rendered 3D shapes look very flat because of the lack of lighting and shading. The goal of this US is to implement basic lighting. This US can be marked as completed after the following criteria were met:

• [x] Basic Lighting implemented (ambient, diffuse, specular)
• [x] Scene looks similar to the picture attached to this US