ui: basic CodeView with syntax highlighting

Added CodeView interface and QtCodeView implementation for showing syntax highlighted code snippets. This change avoids
using the GuiElement hierarchy by using directly using QtClasses and creating QtCodeView in the QtElementFactory.

src/lib/component/view/CodeView.h

@@ -0,0 +1,20 @@
+#ifndef CODE_VIEW_H
+#define CODE_VIEW_H
+
+#include <string>
+
+#include "component/view/View.h"
+
+class GuiElementFactory;
+
+class CodeView: public View
+{
+public:
+	CodeView(std::shared_ptr<ViewManager> viewManager, std::shared_ptr<GuiElement> rootElement);
+	virtual ~CodeView();
+
+	virtual void addCodeSnippet(std::string str) = 0;
+	virtual void clearCodeSnippets() = 0;
+};
+
+#endif // CODE_VIEW_H