add isFixedSize implementation

Yuhang Zhao

2023-12-05 d02f3b0bc32f711bf33a7fd288185963e9e96189

 src/core/CMakeLists.txt

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