Implement event handler

Added event handler implementation.
Moved enginge specific implementation outside graphics module

Signed-off-by: Piotr Krygier <piotrkrygier@everyonecancode@xyz>

red_scarf_engine/meson.build

@@ -17,6 +17,7 @@ executable(
                   ],
   link_with: [
             rse_graphics_lib,
+            rse_events_lib,
             rse_utilities_lib,
             ],
   )