feat(transitions): mosaic dissolve fade-out al final de la fase STARTING (configurable a ui.yaml)

CMakeLists.txt

@@ -93,6 +93,7 @@ set(APP_SOURCES
     source/core/rendering/sprite/animated_sprite.cpp
     source/core/rendering/sprite/animated_sprite_parser.cpp
     source/core/rendering/effects/heat_haze.cpp
+    source/core/rendering/transitions/mosaic.cpp
     source/core/rendering/sdl3gpu/sdl3gpu_shader.cpp
     source/core/rendering/sdl3gpu/viewport.cpp
     source/core/rendering/sdl3gpu/pipelines/crtpi_pipeline.cpp