Layout Template for ic-top-navigation

[gd2910]

Summary

Create an external layout template to showcase ic-top-navigation in a more native full screen/content pattern

💬 Description

With reference to ic-side-navigation, create a separate page with a react style small app showcasing ic-top-nav. ic-side-navigation can be used as reference for this. The page will need to be added to gatsby-browser.js to ensure the main template is not applied.

💰 Use value

A functional example of ic-top-navigation will help developers utilise the component.

Update

This work will be addressed with the new top navigation pattern examples. This ticket should focus on adding a section to the top nav code page and redirect users to the top navigation pattern page

[GCHQ-Developer-112]

This relates #760