Include public policy, regulatory guidance and/or other official CMS.gov resources

[MathiasaurusRex]

Is your feature request related to a problem? Please describe.
We heard from a developer working on Hospital Price Transparency solutions for Hospital systems leveraging Drupal and they had some trouble finding official CMS policy, regulatory guidance and other official CMS.gov resources.

Describe the solution you'd like
Update the outbound review checklist to ask if there are any of the following resources apply to your repo, such as:

• Federal Registrar
• Code of Federal Registrations
• Medicare Learning Network
• CMS Key Issues
• Anything else that would provide context for developers navigating CMS policy.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

There may be other places to add this, such as

1. Could it go into the policy boiler plate for the README?
2. Could it go into CONTRIBUTING.md?
3. Could it go into COMMUNITY_GUIDELINES.md
4. Could it go into github.com/DSACMSorCMSgov/cms-policy-resources

Additional context
The developer we had conversations with was less "Civic Technologist" and more "General engineer who is not familiar with how public policy and public comment periods" so this may be something like an a primer on how to better understand government as well.