[META] `appcali`: Qt 6.9 fails to render Bitmap Fonts

[SeongGino]

I only just found out about this during routine testing when the calibration screen didn't seem to show any fonts, but the cali process itself (crosshair movement, center crosslines) still works. Qt 6.8.3 down to 5.15.x shows these just fine.

I don't know if it's just parsing the internal paths wrong (though it isn't showing errors indicating at such like Qt usually seems insistent on doing), or if it's something weird with the QPainter painter object that's used to merge the contents of the pixmaps into the final canvases - it's not the strings, I know that much for sure.

For now, this may only be an issue with bleeding edge distros e.g. Arch, as 6.8 is the current LTS anyways, but it'd be nice to have this resolved - for dev'ing on such platforms, will just have to use -DOFAPP_QT_VERSIONS=Qt5 to use a Qt 5.x environment instead, if available.

Or maybe it'll just magically work itself out, who knows. 🤷‍♀