Draft: Add new solution components docs to navigation

Add navigation item to global navigation

• Link to the merge request that introduced the new page:
  • Add components for solution (gitlab!180604 - merged)
  • Setup the solution document framework to reflec... (gitlab!180751 - merged)
• Give the MR a descriptive title.
• Optional. Link to the review app showing the new page: https://main-ee-180751.docs.gitlab-review.app/ee/solutions/components/index.html