[Feature] Twins two bot together

[huan]

When a bot (A) is invited to a WeChat room, it (A) should invite bot B to join the same room too, because when A is offline, we need B can send the message into that room.

We should also add a check & fix function to our system so that we can run it periodly, make sure the two bots are both in the rooms that they are invited in.

When a bot found that its twin bot is not in the room that it is in, then it should invite the twin bot into that room, as a fix.