QML deployment docs need to be rewritten

https://doc-snapshots.qt.io/qt6-dev/qtquick-deployment.html talks only about qmake and suggest low-level interaction with the resource file system. It should instead talk about CMake and QML modules. It should also mention that AOT compilation is enabled by default in CMake.

A section on qmake can be retained at the bottom of the document, but it should not be that prominent.