Changelog of Qt6Gtk2

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Version 0.1
* inital release

Version 0.2
* Added Qt version checking
* Added preview support to the file dialog (Ilya Fedin)
* Added "gtk2" platform theme key (lvlgl)

Version 0.3
* Added Qt 6.8 support
* Fixed dock widget buttons size for Qt 6.7 or higher
* Improved GTK settings support (patch by Alexei Sorokin)
