fix backend bug

Firmware Download Supported！

• "ASR", "ASR1601", "ASR1606": EC600M-CNLA test passed with EC600MCNLAR01A01M08_XBND_OCPU_QPY_BETA0831
• "UNISOC", "UNISOC8910", "UNISOC8850": EG912U-GLAA test passed with QPY_BETA0001_EG912U_GLAA_FW
• "RDA8908A": BC25PA test passed with QPY_V0003_BC25PA_FW
• "ASR1803S": EC200A-EUHA test passed with QPY_V0002_EC200A_AUHA_FW and QPY_V0003_EC200A_AUHA_FW
• "MDM9X05": BG95M3-LA test passed with QPY_OCPU_BETA0002_BG95M3_FW and QPY_OCPU_BETA0003_BG95M3_FW
• "EIGEN": EC800E-CNLC test passed with EC800ECNLCR02A01M04_OCPU_QPY_BETA0713
• "FCM360W": FCM360WAAMD-OP-04 test passed with QPY_OCPU_BETA0001_FCM360W_FW
• "FC41D": NOT SUPPORTED NOW!!!

quecpython coding auto completion

支持中（中文简体）英文双语切换。

• detect serial port automatically according to different QuecPython platform.

• The QuecPython plugin for Thonny.
• Supports firmware burning of modules those running QuecPython.