‍Implements https://learnopengl.com/ tutorials via the oscar API

This project provides osc::Tab implementations of many of the tutorials from https://learnopengl.com/ . The itent of this code is to:

Enable verifying that the oscar graphics API is capable of rendering each LearnOpenGL tutorial without directly referrring to OpenGL itself
Act as a rosetta stone between the OpenGL API and the oscar graphics API
Provide working examples of UIs that use the oscar API