Cleaned up the Renderer2D

[JonasAlmaas]

Cleanup of the Renderer2D Class

The renderer2D class was a bit of a mess, so I took some time and cleaned it up. Now everything uses one super method for drawing. It functions exactly the same as the old code but looks a bit nicer.

PR impact

List of related issues/PRs this will solve:

Impact	Issue/PR
Issues this solves	None
Other PRs this solves	None

[TheCherno]

Will come back to this once Vulkan is implemented.