MISC: Makes the thing works with Qt6

CMakeLists.txt

PreCompiledHeaders.cmake

README.md

src/Lib/Ass/Line.hh

src/Lib/Ass/Syl.hh

src/Lib/JsonBuilder.hh

src/Lib/Utils.cc

src/Lib/Utils.hh

src/PreCompiledHeaders.hh

src/UI/DocumentViews/AssLinesModel.cc

src/UI/DocumentViews/MpvContainer.cc

src/UI/FakeVim/FakeVimActions.cc

src/UI/FakeVim/FakeVimActions.hh

src/UI/FakeVim/FakeVimHandler.cc

src/UI/FakeVim/FakeVimHandler.hh

src/UI/FakeVim/FakeVimTr.hh

src/UI/MainWindow.cc

src/UI/MainWindow.hh

src/UI/PropertyModel.cc

src/UI/ScriptDocumentView.cc