Document "qt-cmake" or add an example which folder in the Qt installation should be listed in CMAKE_PREFIX_PATH

The current docs (https://doc-snapshots.qt.io/qt6-dev/cmake-get-started.html) tell the user:

" 1. Set the CMAKE_PREFIX_PATH environment variable to include the Qt 6 installation prefix."

and then refer to QtCreator which will set it up right automatically...

I think it is better to provide an example which folder from a Qt installation should be used. I'm not sure if "installation prefix" is self-explainatory.

On my machine I have following folders to choose from:

➜  ~ ls ~/development/installs/qt6dev 
bin          include      libexec      modules      plugins      translations
doc          lib          mkspecs      phrasebooks  qml
➜  ~ ls ~/Qt                         
6.1.1               Examples            MaintenanceTool.dat dist
6.1.2               InstallationLog.txt MaintenanceTool.ini installerResources
6.2.0               Licenses            Qt Creator.app      network.xml
Docs                MaintenanceTool.app components.xml
➜  ~ 

Alternatively, and maybe even better, in addition, the docs mention and explain "bin/qt-cmake". Imagine someone who used qmake before and did not read a book about CMake lands on this page. IMHO, I think this is the user who this page is for. With qmake, you just call the one from a Qt installation you wanna use and the rest is done for you. qt-cmake does something similar but it is not documented