Detect buzzer via Pin.board attribute

Replace the module-import check for XRPLib.buzzer with an explicit hardware capability check using hasattr(Pin.board, "BOARD_BUZZER") in XRPLib/resetbot.py.

Author: SaintSampo

XRPLib/resetbot.py

@@ -70,7 +70,7 @@ def reset_hard():
 if "XRPLib.board" in sys.modules:
     reset_led()
 
-if "XRPLib.buzzer" in sys.modules:
+if hasattr(Pin.board, "BOARD_BUZZER"):
     reset_buzzer()
 
 if "XRPLib.servo" in sys.modules: