make demo a GUI application in CMake

Yuhang Zhao

2025-02-10 9e96ea43436d5ed200c57d6b229cddf9bdf9e55a

 .gitignore

@@ -76,7 +76,7 @@
.DS_Store
*/.DS_Store

build-src*
build-*
build/
cmake-build*
*.user