feat: phong lighting

[craftablescience]

• [x] Implemented Blinn-Phong lighting and closes #23
  • 4 directional lights
  • 32 point lights
  • 16 spot lights
• [x] Made shader #include directives recursively apply macros to the pasted contents
• [x] Added -j to cmake native build flags in CI where possible for a massive speed boost (thanks @ashifolfi!)
• [x] Fix up light entities to manage their properties better