Add UI for DIDKIT.

DIDKit/App/MenuAction/ExitAction.h

@@ -0,0 +1,16 @@
+#ifndef EXITACTION_H
+#define EXITACTION_H
+
+#include <QAction>
+
+class ExitAction : public QAction
+{
+public:
+    ExitAction(const QString& aName, QWidget* aParent = nullptr);
+    ~ExitAction() override;
+
+private:
+    void executeAction();
+};
+
+#endif // EXITACTION_H