[AutoReply] As a Dev, I can upload a yml into Repo to manage QnAs in Chatopera BOT

[hailiang-wang]

In wechat groups, people would ask some questions frequently, these questions should be replied with BOT, the answers are from BOT QnAs Knowledge.

Describe the solution you'd like
I would like to create a bot in chatopera bot platform, then integrate it with OSSChat, This step would be fulfilled by #152.
After that, I can add a YML file into my GitHub repo, it is in a format that is under discussion, then I would send a message to the OSSChat BOT in wechat, like - "sync faqs", after that, the bot in ChatOpera would be pushed faqs in the faq YML file.

Further, when people ask these questions in the wechat group, OSSChat BOT will reply automatically.

Issue list:

• Mapping yml to FAQ json and vice versa #173
• Import BOT FAQs when setup bot on starting #175