Add SignalReady to APU init

src/app/emu/debug/log.h

@@ -0,0 +1,43 @@
+#ifndef YAZE_APP_EMU_LOG_H_
+#define YAZE_APP_EMU_LOG_H_
+
+#include <iostream>
+#include <string>
+
+namespace yaze {
+namespace app {
+namespace emu {
+
+// Logger.h
+class Logger {
+ public:
+  static Logger& GetInstance() {
+    static Logger instance;
+    return instance;
+  }
+
+  void Log(const std::string& message) const {
+    // Write log messages to a file or console
+    std::cout << message << std::endl;
+  }
+
+ private:
+  Logger() = default;
+  Logger(const Logger&) = delete;
+  Logger& operator=(const Logger&) = delete;
+};
+
+// Loggable.h
+class Loggable {
+ protected:
+  Logger& logger_ = Logger::GetInstance();
+
+  virtual ~Loggable() = default;
+  virtual void LogMessage(const std::string& message) { logger_.Log(message); }
+};
+
+}  // namespace emu
+}  // namespace app
+}  // namespace yaze
+
+#endif  // YAZE_APP_EMU_LOG_H_