Improve empty group empty state to better explain groups/projects in GitLab

Problem to solve

UX research indicates that GitLab specific terminology increases the learning curve for new users from other platforms. The group and project structure was especially difficult for new users to grasp.

Proposal (figma)

• Update the group empty state to better explain what groups and projects are.
  • URL: https://gitlab.com/{group-name} of empty groups
• Bring group empty state in-line with Pajamas guidelines

Production versus design proposal:

Production	Proposal