[Development] Metatype system in Qt6

[Jedrzej Nowacki]

Hi everyone!

  While main heat on the mailing list is taken by topic how to encode that we 
are nice, friendly and respectful to each other, I would like to show some 
side project that I had. It is a proposal for base of metatype system for Qt6. 
You can look and comment at it here: https://github.com/nierob/qmetatype. It 
is quite fresh and it was rather a storage for functionality ideas. I haven't 
tried to compare performance of it to the current system, but for sure it has 
more flexibility and I believe, that conceptually it could serve us during 
Qt6. Anyway before spending too much time on it I would like to get some early 
feedback and questions.

Cheers,
  Jędrek