Builtin general structure created. Added a builtin::BasicScene
class for quick general testing of the engine on different systems.
The builtin::BasicScene class greatly reduces the amount of code
needed to be handled by the developer by offering a pre-made way
to handle it. It even includes pre-made shaders!
Starting the setup for builtin types for rendering. This will allow
the engine to be easier to use for beginners while still offering
great modularity and functionality. The builtin namespace is
intended to simplify mesh loading and rendering. It should
eventually offer pre-made shaders to simplify the rendering of the
builtin types. Possibly in the future, it could have partially
setup scenes/application to simplify scene/application building
