Working on adding colors

src/simudator/gui/color_scheme.py

src/simudator/gui/cpu_graphics_scene.py

...udator/gui/module_graphics_item/mia/mia_memory_graphic.py

...imudator/gui/module_graphics_item/module_graphics_item.py

src/simudator/gui/port_graphics_item.py

src/simudator/gui/signal_graphics_item.py