update rdai.money site with auditing report and project status

ACs:

- Auditing report section
  - downloadable link for v1.0.0 auditing report
  - link to quantstamp hosting site
  - github link to the diff between v1.0 branch and the quantstamp audit tag
- Project status section
  - we are audited and live
  - use our dapp
  - join our community
  - help us build
  - etc.