[apps] Add a code app

Change-Id: Icc72c378a6434b5d3b0af74f23e31ea7514882b8

apps/code/editor_controller.h

@@ -0,0 +1,17 @@
+#ifndef CODE_EDITOR_CONTROLLER_H
+#define CODE_EDITOR_CONTROLLER_H
+
+#include <escher.h>
+
+class EditorController : public ViewController {
+public:
+  EditorController(Responder * parentResponder);
+  View * view() override;
+  void didBecomeFirstResponder() override;
+private:
+  char buffer[256];
+  TextArea m_view;
+};
+
+#endif
+