feat: implement breadcrumb component (#508)

Ben Schlegel

2023-09-29 0b61f6fbfd20556102ce23444ae7eb9348472952

 quartz/components/styles/legacyToc.scss

@@ -12,7 +12,7 @@
      margin: 0;
    }
  }
    

  & ul {
    list-style: none;
    margin: 0.5rem 1.25rem;