WIP Flow v2.0

[hollenberry]

This PR updates the course based on ✨ feedback in #9 , #11 , and #4 .

Notably:

• We reduced the flow to focus on actions relevant to the course objectives. Bot will abstract the rest away.
• We'll be heavily consolidating our explanations, but making sure to keep content that meets our revised learning objectives.
• We want to keep one or two items that were removed, but we'll do that in less sentences.
• We'll link out to valuable external resources where valid, and stay mindful of repeating content that can be found elsewhere.

Best news is very little content needs to be recreated here, if any. It's just a matter of re-organizing our logic and responses to be more intentional.

This closes #11 . We'll be using much of the pruning from the proposed commits, but our file structure and flow is dramatically different and it made more sense to start from a new branch.

[a-a-ron]

@JasonEtco I'd love your review on the config.yml file when you get a chance