[UI] Implement bread crumb and header

[amehta-scottlogic]

Acceptance Criteria

• UI has basic header that is visible in all views
• The header displays breadcrumbs showing the route the user is on
  • In summary view it is empty
  • In single city view it is city -> Bristol
  • lighthouse has been run and any accessibility issues have been fixed (summary page only)
  • playwright tests have been written for this - let's check which browser they use and target that