[Feature] Add pouchrobot, automated management community

[CalvinKirs]

Hello, we hope that community management can be automated, pouchrobot could help finish lots of work in open source project on GitHub. If we divide all these practical feature into categories, we can find the following four parts:

issue/pull request triage
weekly report auto generating via a filed issue(example:AliyunContainerService/pouch#2337)
some doc auto generation for project via pull request
friendly notice for pull request's status change

Therefore, we hope that some friends who are familiar with the go language can complete this work.
If you are interested and want to complete it, you can leave a message below

github address: https://github.com/pouchcontainer/pouchrobot

Language requirement: GO