added logger

triing to add logger and some queue features (main loop can send and retrieve items form queue based on schedule and communication with dekstop interface)

src/client_backend/log.h

@@ -0,0 +1,21 @@
+#ifndef LOG_H
+#define LOG_H
+
+#include <iostream>
+#include <ctime>
+#include <iomanip>
+#include <sstream>
+#include "well_known.h"
+enum class LOGLEVEL {
+    INFO,
+    WARN,
+    ERR
+};
+
+std::string get_loglevel(LOGLEVEL level);
+
+template <typename... Args>
+void log(LOGLEVEL level, const std::string& message, Args&&... args);
+
+
+#endif // LOGGER_H