Add button press handle, added print time calc

src/tunes.h

@@ -43,4 +43,10 @@ void playTune(int tuneIndex) {
         delay(noteDuration[i] + 20);
         noTone(PIN_BUZZER); // Stop the tone
     }
+}
+
+void beep() {
+    tone(PIN_BUZZER, 1000, 100);
+    delay(100);
+    noTone(PIN_BUZZER);
 }