sidebar breakpoint refacto

assets/sass/_theme/_utils.sass

assets/sass/_theme/blocks/call_to_action.sass

assets/sass/_theme/blocks/chapter.sass

assets/sass/_theme/blocks/files.sass

assets/sass/_theme/blocks/image.sass

assets/sass/_theme/blocks/key_figures.sass

assets/sass/_theme/blocks/organization_chart.sass

assets/sass/_theme/blocks/pages.sass

assets/sass/_theme/blocks/partners.sass

assets/sass/_theme/blocks/posts.sass

assets/sass/_theme/blocks/timeline.sass

assets/sass/_theme/design-system/table_of_contents.sass

assets/sass/_theme/design-system/typography.sass