Split the documentation into several modules

Right now the qtinterfaceframework documentation consist of 3 modules:

• QtInterfaceFramework
• QtIfMedia
• QtIfVehicleFunctions

The last two are reference modules.

Those modules should be split, similar to https://doc.qt.io/qt-5/qtqml-index.html and https://doc.qt.io/qt-5/qtquick-index.html, and moved to Qt Labs. The documentation should be adjusted accordingly. 

The git history also need to be split in this case and correct attribution licenses set.