NSIS阻塞等待卸载

https://stackoverflow.com/questions/4676898/how-to-execute-an-nsis-uninstaller-from-within-an-another-nsis-installer-and-wai

 https://nsis.sourceforge.io/Docs/Chapter3.html#3.2.2https://stackoverflow.com/questions/24595887/waiting-for-nsis-uninstaller-to-finish-in-nsis-installer-either-fails-or-the-uni