feat(toc,explorer): add accessibility for toggle (#1327)

Andrew

2024-08-09 27a41abb62cc9005ed4234bdb02f38b6cfeedec3

 quartz/components/styles/toc.scss

@@ -29,8 +29,18 @@
  list-style: none;
  overflow: hidden;
  max-height: none;
  transition: max-height 0.5s ease;
  transition:
    max-height 0.5s ease,
    visibility 0s linear 0s;
  position: relative;
  visibility: visible;

  &.collapsed {
    transition:
      max-height 0.5s ease,
      visibility 0s linear 0.5s;
    visibility: hidden;
  }

  &.collapsed > .overflow::after {
    opacity: 0;