SlackClient

[shhlife]

• [ x] I have read and agree to the contributing guidelines.

Is your feature request related to a problem? Please describe.
It would be helpful to have a SlackClient that would allow Agents, Pipelines, and Workflows to interact with Slack.

Describe the solution you'd like
I would like to be able to provide a SlackClient to an Agent so it can send messages, images, and more.

Describe alternatives you've considered
I've created a simple Chatbot that can respond to posts - but it only responds with text. Ideally we have a Client that can work with the slack api to do more interesting things - upload images, get information about the user, etc.