Add Mac system button area interfaces

Sine Striker

2023-12-17 52a662ed17db6c3a3ff2050d61bc2e06ea21b056

 src/quick/CMakeLists.txt

@@ -13,6 +13,10 @@
    quickwindowagent.cpp
)

if(WIN32)
    list(APPEND _src quickwindowagent_win.cpp)
endif()

qwk_add_library(${PROJECT_NAME} AUTOGEN
    SOURCES ${_src}
    LINKS QWKCore