Add business sector development guide for naming convention of topic, producer group and consumer group.
Add business sector development guide for naming convention of topic, producer group and consumer group.

NDPMediaCorp/RocketMQ,lizhanhui/Alibaba_RocketMQ,masterasia/Alibaba_RocketMQ,masterasia/Alibaba_RocketMQ,NDPMediaCorp/RocketMQ,gspandy/Alibaba_RocketMQ,lizhanhui/Alibaba_RocketMQ,masterasia/Alibaba_RocketMQ,lizhanhui/Alibaba_RocketMQ,masterasia/Alibaba_RocketMQ,gspandy/Alibaba_RocketMQ,gspandy/Alibaba_RocketMQ,gspandy/Alibaba_RocketMQ