add: spdlog and basic client code.

Util/Util.h

@@ -0,0 +1,17 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <QObject>
+
+class Util : public QObject
+{
+    Q_OBJECT
+public:
+    Util();
+
+public:
+    static void InitLogger(const QString& logPath, const QString& mark);
+    static void ConsoleMsgHander(QtMsgType type, const QMessageLogContext& context, const QString& msg);
+};
+
+#endif   // UTIL_H