Create an awesome watermill repository

[sagikazarmark]

Would be nice to have a curated list of third-party libraries written for Watermill.

For example I was looking for a Zap adapter for the logger and found this after some searching: https://github.com/garsue/watermillzap

But my first instinct was to look around in this repo and the org, so I would have found it sooner there.