Component - TrialPageNav

[andershopkins]

Create a component, similar to InPageNav, that allows us to link to groups of other pages instead of in-page content.

See https://jss.sitecore.com/connected-demo/getting-started/repository as an example of the navigation:

Requirements

• Content is driven by a javascript partial, like our main navigation
• Top level "collapse" headers do NOT use <a> tags and do not contain href values
• If a page is in a current section, that section should be expanded by default
• Consider driving the "next page" link from this content, as then it becomes a single source of truth for managing both elements
• Style it sort of like InPageNav, but I can help with finessing those details.
  • Use the arrow from our navigation
  • Use the green brand color
  • Use bold text

[jst-cyr]

Supports migration done via issue #58