Updated to use Qt6; Created initial structure of the viewer with OpenGL widget

src/qtviewer/ParseIfcFile.cpp

@@ -0,0 +1,15 @@
+#include "ParseIfcFile.h"
+
+#include "../ifcparse/Ifc2x3.h"
+#define IfcSchema Ifc2x3
+
+#include "../ifcgeom/IfcGeom.h"
+
+ParseIfcFile::ParseIfcFile() {}
+
+ParseIfcFile::~ParseIfcFile() {}
+
+void ParseIfcFile::Parse(const std::string& filePath)
+{
+    //IfcParse::IfcFile ifcFile(filePath);
+}