feat: add server notify

Core/notifycontroller.h

@@ -0,0 +1,18 @@
+#ifndef NOTIFYCONTROLLER_H
+#define NOTIFYCONTROLLER_H
+
+#include <QObject>
+#include <QMessageBox>
+
+class NotifyController : public QObject
+{
+    Q_OBJECT
+public:
+    explicit NotifyController(QObject *parent = nullptr);
+
+    void showWarning(QString text);
+signals:
+
+};
+
+#endif // NOTIFYCONTROLLER_H