Rename chatie-grpc -> wechaty-grpc

[huan]

After some time, we believe that the gRPC package is a Wechaty ecosystem module, so it will be better named wechaty-grpc.

The NPM module will be renamed soon: wechaty/grpc#106

I'd like to suggest that the Python Wechaty follow this naming conversion, use a new module named wechaty-grpc in the future as well.

[huan]

Link to wechaty/grpc#117

Please help to approve the PR so that we can have enough confidence to merge it.

Thanks!

[wj-Mcat]

Approvement given. 🌸

[wj-Mcat]

You made a great breaking change for python-wechaty, thanks a lot. I'll close this issue.

[huan]

Thanks for closing this issue.

However, I do not think we have any breaking changes for the public API in this PR, everything should keep unchanged from our users!