Add GQL Types for Additional EE Entities

[tn3rb]

Before we can begin building out any further UI elements with React + Apollo + GQL, we will first need to add the GQL Types. These include:

• [ ] status
• [ ] question *
• [ ] question group *
• [ ] question group question *
• [ ] question option *
• [ ] answer
• [ ] message
• [ ] message template
• [ ] message template group
• [ ] line item
• [ ] transaction
• [ ] registration
• [ ] registration payment
• [ ] payment
• [ ] payment method
• [ ] checkin

* evaluate schema and refactor for better future use

[alexkuc]

Ties in with #1301

[alexkuc]

@tn3rb Wasn't this actually done?

https://github.com/eventespresso/barista/tree/master/packages/data/src

Or this issue is about something else?