autolink headings

website/src/docs/docs.css

@@ -0,0 +1,36 @@
+h1::before,
+h2::before,
+h3::before,
+h4::before,
+h5::before,
+h6::before {
+  display: block;
+  content: ' ';
+  margin-top: -70px;
+  height: 70px;
+  visibility: hidden;
+  pointer-events: none;
+  position: relative;
+}
+
+h1:hover .icon-link,
+h2:hover .icon-link,
+h3:hover .icon-link,
+h4:hover .icon-link,
+h5:hover .icon-link,
+h6:hover .icon-link,
+.icon.icon-link:hover {
+  visibility: visible;
+}
+.icon.icon-link {
+  background-image: url(./link.svg);
+  background-repeat: no-repeat;
+  width: 16px;
+  height: 16px;
+  display: block;
+  position: absolute;
+  visibility: hidden;
+  margin-left: -20px;
+  width: 20px;
+  margin-top: 8px;
+}

website/src/docs/link.svg

@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true">
+  <path fill-rule="evenodd" fill="white"
+    d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z">
+  </path>
+</svg>