Check:
- WinMain for inout handling wiht SDL
- OgreGraphicsFramework.cpp->InitSDL() for SDL and ImGUI setup
- OgreGraphicsFramework.cpp->Cleanup() for SDL and Imgui Cleanup
- OgreGraphicsFramework.cpp->update() for ImGUI Rendering
- OgreGraphicsFramework.cpplines 41-60 for SDL Ogre connection