Implement mainwindow example

Sine Striker

2023-12-05 f8975a7d449bac21a2fdbc1a8ca85d1f5b99b362

 src/core/CMakeLists.txt

@@ -6,6 +6,7 @@
set(_src
    qwkcoreglobal.h
    qwkcoreglobal_p.h
    qwkcoreglobal.cpp
    corewindowagent.h
    corewindowagent_p.h
    corewindowagent.cpp