Backlinks
* fix: Fix `Backlinks` not applying the display class Fix #518 * fix: Apply `displayClass` to all layout components * refactor: Use same style * fix: Remove `undefined` class using coalescing operator
* feat: implement breadcrumbs * style: fix styling, move breadcrumbs to top * refactor: move `capitalize to `lang.ts`` * refactor: clean breadcrumb generation * feat: add options to breadcrumbs * feat: implement `resolveFrontmatterTitle` * feat: add `hideOnRoot` option * feat(consistency): capitalize every crumb * style: add `flex-wrap` to parent container * refactor: clean `Breadcrumbs.tsx` * feat(accessibility): use `nav`, add aria label * style: improve look in popovers by adding margin * docs: write docs for breadcrumb component * refactor: collapse `if` condition for hideOnRoot * chore: add todo for perf optimization * docs: update introduction