WIP: Add network graph view to default project views

What does this MR do?

It adds a Network graph option to the list of project views on the user preferences page. When selected, the default project view will render the network graph.

Why was this MR needed?

To extend the options for default project views.

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #18330 (closed)