quality of life changes

src/game/game.cpp

src/game/game.h

src/game/input/events.hpp

src/game/input/sdl_input.cpp

src/game/renderer/abstract_renderer.h

src/game/renderer/sdl_renderer.cpp

src/game/renderer/sdl_renderer.h

src/game/renderer/sdl_resources.cpp

src/game/state/state.cpp

src/game/state/state.h