qt6

Add support for the Qt 6 application and UI framework

Name	Category	Description
qmplay2	media-video	A Qt-based video player, which can play most formats and codecs
qpwgraph	media-sound	PipeWire Graph Qt GUI Interface
qsampler	media-sound	Graphical frontend to the LinuxSampler engine
qsynth	media-sound	Qt application to control FluidSynth
qtkeychain	dev-libs	Qt API for storing passwords securely
quazip	dev-libs	Simple C++ wrapper over Gilles Vollant's ZIP/UNZIP package
qwt	x11-libs	2D plotting library for Qt
qxlsx	dev-libs	Excel file(*.xlsx) reader/writer library using Qt
sigil	app-text	Multi-platform WYSIWYG ebook editor for ePub format
stellarium	sci-astronomy	3D photo-realistic skies in real time
swi-prolog	dev-lang	Versatile implementation of the Prolog programming language
transmission	net-p2p	A fast, easy, and free BitTorrent client
vtk	sci-libs	The Visualization Toolkit