Include @atlaskit Feedback collector

[fidelisrafael]

We are using Atlassian's Atlaskit as frontend UI Kit, it's really, really amazing and beautiful.

We need to receive feedback from users, because this project is still a project-in-progress and there are many errors to be fixed and discovered ;)

Dependencies: We need a API endpoint to save this data. This can be integrate with a service...can be even one message in Slack, or maybe one spreedsheet. The simpler, the better.

Check it out the Atlaskit documentation (and a live demo) at:
https://atlaskit.atlassian.com/packages/core/feedback-collector