feat(rendering): lighting module CPU + gradient config YAML

CMakeLists.txt

@@ -81,6 +81,7 @@ set(APP_SOURCES
     source/core/input/mouse.cpp
     source/core/rendering/screen.cpp
     source/core/rendering/canvas.cpp
+    source/core/rendering/lighting.cpp
     source/core/rendering/notifier.cpp
     source/core/rendering/render_info.cpp
     source/core/rendering/gif.cpp