Display the number of packages on the project home screen

Context

When you navigate to your GitLab project, you can see a high level count of commits, tags, files, and more. (see below screen shot)

Problem to solve

The problem is that the number of packages in the registry is not included. This means that anyone accessing the project that is not actively navigating to the package registry may not be aware that the project has packages.

Proposal

Add a count of packages to the top of the project home page. When a user clicks the link they should be brought to that project's package registry, where they can click around and discover content.