Bug: message delimiter misinterpreted when multiple escape bytes preceed a message delimiter

im mmcu_uart.py the method find_unescaped_stop(self, buffer, start_index) evaluates all escape bytes as actual escapes. Escape bytes, preceeded by another escape byte should not escape the next byte.

	def find_unescaped_stop(self, buffer, start_index):
		"""Find the next unescaped UART_STOP_CMD (\n) in the buffer starting from start_index"""
		while True:
			stop_index = buffer.find(self.UART_STOP_CMD, start_index)
			if stop_index == -1:
				return -1  # No stop found
			# Check if the stop is escaped
			if stop_index > 0 and buffer[stop_index - 1] == self.UART_ESCAPE:
				# Escaped stop, look for the next one
				start_index = stop_index + 1
			else:
				return stop_index  # Unescaped stop found