TD: port to Qt6

* in QtConcurrent::run the order of 1st and 2nd argument are swapped
* QtConcurrent::run asserts that the argument of the passed function pointer is not non-const
* Used methods of QFontDatabase are static in Qt5 and Qt6
* QTextStream::setCodec() has been removed in Qt6
* Argument of enterEvent() has changed from QEvent to QEnterEvent
* QTextCharFormat::setFamily() is deprecated

src/Mod/TechDraw/App/DrawViewDetail.h

@@ -73,7 +73,7 @@ public:
     void detailExec(TopoDS_Shape& s,
                     DrawViewPart* baseView,
                     DrawViewSection* sectionAlias);
-    void makeDetailShape(TopoDS_Shape& shape,
+    void makeDetailShape(const TopoDS_Shape& shape,
                          DrawViewPart* dvp,
                          DrawViewSection* dvs);
     void postHlrTasks(void) override;