this moves the entire main ui (excluding settings) to qtquick from qwidgets.
this loses some of the more esoteric kxmlgui features but should be a good path forward on the balance
the actual map is still being qpainted, so this isn't super ideal but the plan there is to hopefully use kquickcharts eventually instead of a custom implementation.
settings dialog still needs porting but is kept qwidget for now to at least reduce the scope of this port slightly