Provide a default configuration that matches core's email receipt

Problem/Motivation

For first time setup it's a little cumbersome to work out what collection of tokens will make an email look like the default receipt email from Commerce core.

Proposed resolution

Provide an example definition that matches Commerce core's standard notification.

Remaining tasks

Provide an example definition that matches Commerce core's standard notification.
Add test coverage.

User interface changes

An example configuration exists to show how to set up emails.

API changes

TBD

Data model changes

TBD