Onboarding demo (I2P/CI/CD)

Create visionary demo onboarding/enabling/adoption from https://gitlab.com/gitlab-org/gitlab-ce/issues/32638.

Links

• Depends on fleshing out plan in: https://gitlab.com/gitlab-org/gitlab-ce/issues/32638
• Related: https://gitlab.com/gitlab-org/gitlab-ce/issues/32640
• Part of: https://gitlab.com/gitlab-org/gitlab-ce/issues/32639