Add CDC case study

What's Changed

• 0kl usds patch 1 by @0kl-usds in #879
• Staging by @0kl-usds in #880
• Twitter logo by @amwhitty in #882
• Cdc simple report by @amwhitty in #883
• revert twitter logo by @amwhitty in #886
• Cdc simple report by @amwhitty in #885
• Cdc simple report by @amwhitty in #887
• Cdc simple report by @amwhitty in #888
• Update 0007_cdc-simple-report.md by @amwhitty in #889
• add CDC case study by @amwhitty in #890

New Contributors

• @0kl-usds made their first contribution in #879

Full Changelog: deia-CTA-edit...add-cdc-case-study