Add YAML normalization

[aduth]

🛠 Summary of changes

Adds an enforces YAML normalization, using the @18f/identity-normalize-yaml package published from identity-idp in 18F/identity-idp#8654.

Why?

• Improved typography using punctuation formatters
  • Also resolves some existing inconsistency where we previously used smart quotes in some places, either due to Jekyll's built-in smart quotes handling or where content was copied from some other source
• Consistency of content formatting in YAML files
  • Improved readability by enforced key alphabetization

📜 Testing Plan

make lint_yaml

Ensure no regressions in displayed content in preview site.