Display the date project was created
### Description
Display date project was created
### Proposal
On the project's home page display the date that the project was created. This will probably just need to reflect the project's `created_at` property
### Links / references
### Documentation blurb
#### Use cases
Who is this for? Provide one or more use cases.
### Feature checklist
Make sure these are completed before closing the issue,
with a link to the relevant commit.
- [ ] [Feature assurance](https://about.gitlab.com/handbook/product/#feature-assurance)
- [ ] Documentation
- [ ] Added to [features.yml](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/features.yml)
issue