Add notification observer on Mac

SineStriker

2023-12-27 88b5b56b6a67d93208eae3980af2f30da09dd8ae

 examples/shared/widgetframe/CMakeLists.txt

@@ -13,4 +13,9 @@
    QT_LINKS Core Gui Widgets
)

set_target_properties(${PROJECT_NAME} PROPERTIES
    CXX_STANDARD 17
    CXX_STANDARD_REQUIRED TRUE
)

target_include_directories(${PROJECT_NAME} PUBLIC . ..)