Import the cookie banner so that users can include it in the prototype kit without
needing to import it themselves, as we tell them to do in the ‘Getting Started’
documentation in the Design System[1]

[1]: design-system.service.gov.uk/get-started/prototyping/#:~:text=When%20using%20Nunjucks%20macros%20in%20the%20Prototype%20Kit%20leave%20out%20the%20first%20line%20that%20starts%20with%20%7B%25%20from%20....