Core: Add App::LocalCoordinateSystem.

Most of App::Origin is moved into this sub class of App::Origin.
Add App::Point. Change graphics of the planes/axis.
Remove scale-by-content behavior and make it fixed size on screen.

src/App/Application.cpp

@@ -2150,6 +2150,8 @@ void Application::initTypes()
     App::DatumElement              ::init();
     App::Plane                     ::init();
     App::Line                      ::init();
+    App::Point                     ::init();
+    App::LocalCoordinateSystem     ::init();
     App::Part                      ::init();
     App::Origin                    ::init();
     App::Link                      ::init();