Add Page Setting for Tree Preview Default State

[blahutka]

Objective

Add a setting to manage the default state of the page tree preview (collapsed or expanded) when rendering the HTML preview. This setting will allow users to define if they want the tree preview to be collapsed or open by default.

New Setting: Create a page setting (tree_preview_default_state) that allows users to set the default display state of the page tree preview.

Options: collapsed or expanded

Be aware that with a large number of pages or deeply nested structures, the tree preview may appear cluttered, potentially impacting readability and usability. This setting is intended to help manage visibility, but users with complex page hierarchies may need to collapse sections manually for a clearer view.

Right now we are overriding this state in

  module Spina
        module Pages
          module PageComponent

            def collapsed?
              return true if page.resource_id.present?

              @page.root? ? false : true
            end
          end
        end
      end