Dynamic Lighting support

[davidmc971]

Some related resources:

• https://youtu.be/fsbECSpwtig
• https://youtu.be/nSf1MpsWKig
• https://youtu.be/8oy2R1OdXqQ
  • Try adding support for irregular shapes by using transparency on the stencil

[davidmc971]

Dynamic Lights working, following improvements TODO:

• Cache Vertices and Light Positions
• Try to optimize pipeline with geometry shader(s)