feat: complete assembly mesh relay control path

- synchronize STM8 application and external flash layout updates\n- add assembly bootloader and assembly application test projects\n- add UART1 interrupt receive ring buffer\n- parse JDY-28M Mesh outer frames and source addresses\n- add CRC-16/MODBUS validation\n- implement relay control command 0x01 and response 0x81\n- support unicast and broadcast relay control frames\n- update host protocol, OTA documents, and serial tools

include/ota_manager.h

@@ -27,7 +27,6 @@ uint8_t OtaManager_GetExpectedOffset(uint16_t *offset);
  * 读取Bootloader写入的升级结果并准备由主程序主动上报。
  * @return 0表示没有待上报结果，非0表示升级结果码。
  */
-uint8_t OtaManager_GetBootloaderResult(void);
 /** 主机确认升级结果后清除待上报状态。 */
 void OtaManager_AcknowledgeBootloaderResult(void);