add support for reporting device errors up through the phone to analytics

related to https://github.com/meshtastic/Meshtastic-esp32/issues/53

src/error.h

@@ -0,0 +1,7 @@
+#pragma once
+
+/// Error codes for critical error
+enum CriticalErrorCode { NoError, ErrTxWatchdog };
+
+/// Record an error that should be reported via analytics
+void recordCriticalError(CriticalErrorCode code, uint32_t address = 0);