nl-design-system/backlog

AI Summary: Design and implement a 'Page Body' component for the NL Design System. This component needs to address centering content out-of-the-box, ensure equal width with page header/footer, provide guidance on breadcrumb and landmark placement (main and aside), and facilitate breakout sections for full-width backgrounds or components. Discussions are needed to determine the component's necessity and optimal structure, considering potential issues like the lack of a grid system and the need for clear goals.