New backend - Qt

[Ksengine]

On linux toga uses GTK+
but some platforms like KDE already has Qt.
some users are familiar with Qt.

so its better if toga can develop a Qt port

Threre are few Qt impliments

• PyQt5
• PyQt4
• Pyside2
• Pyside
  They all has nearly same API.

I like to work on this issue myself

[freakboy3742]

If you want to contribute a Qt implementation of Toga, then go right ahead! A placeholder implementation already exists in the nursery. Submit pull requests against that location; once the implementation starts to show signs of viability, we can move it to the supported list.

[Ksengine]

ok I will start creating basics on toga_qt/libs folser