Implement VCanvas and Update TextElem

- Text now requires a font and is able to take an individual scale
- Container requires &ref for Elements to make sure they always exist
- SetViewport now sets the canvas as well
- SetBaseViewport Sets the Virtual Canvas Size
- Layout Now requires a Drawlist reference in Render function
- main.cpp: updated the template

include/pd/ultra/layout.hpp

@@ -11,14 +11,7 @@ class PD_API Layout : public Container {
   Layout() {}
   ~Layout() {}
 
-  void SetFont(PD::Li::Font& font);
-
-  void Render();
-
-  const PD::Li::Drawlist& Data() const { return pList; }
-
- private:
-  PD::Li::Drawlist pList;
+  void Render(PD::Li::Drawlist& list);
 };
 }  // namespace Ultra
 }  // namespace PD