Use a dummy project for user onboarding
The onboarding MVC in #57832 will start with walking a new user through GitLab CE. This is a good MVC for validating the approach, but we need to have a greater control over the experience.
- Instead of walking through GitLab CE, walk through an imported project specific to the onboarding exercise.
- The project should be simple (HTML static site) with some dummy data to show off issues and MRs.
- For GitLab.com, we could have the project spin up as a configured GitLab Page with a configured .gitlab-ci.yml so we can demonstrate CI/CD live during the walkthrough.
- The dummy project should be easy to tear down, but this could be a future iteration.