Create a tool that creates an initial Qt CMake project

Create a tool that mimics "qmake -project", but for CMake.
It should add the necessary find_package calls and add the source files.

Extra sugar on top: scan the source for includes and deduct the needed Qt modules.

There's https://github.com/KDAB/KDToolBox/blob/master/qt/cmake-project/cmake-project
but that's not platform-independent.
I suggest to implement this tool in CMake itself and run it by wrappers like configure/configure.bat.