Qt 6 Update

[miketrahearn]

The guide here is very thorough! However there are a few places where the recommendations might be improved for updating in line with Qt6. But thanks for the awesome work here and sharing with everyone!

[Furkanzmc]

Hello Mike!

Thank you! I haven't had time recently to update it to the latest QML offers. I want to add sections for making QML code easier to be compiled as well.

Your contribution would be great if you are willing to make some updates for Qt 6! And if you have a list of those things in your mind, you can also just write a bullet point of things that should be updated so I don't miss those things when I'm doing an update.

[akontsevich]

Created my edition variant of this document, changed links and examples to Qt6 doc/style there:
https://github.com/akontsevich/QML-Coding-Guide/tree/extended

Anything else to add regarding Qt6?

My changes list and preferences: akontsevich#1