docs(bowser): auto-generate docs

docs/scripts/nav.js

@@ -0,0 +1,12 @@
+function scrollToNavItem() {
+    var path = window.location.href.split('/').pop().replace(/\.html/, '');
+    document.querySelectorAll('nav a').forEach(function(link) {
+      var href = link.attributes.href.value.replace(/\.html/, '');
+      if (path === href) {
+        link.scrollIntoView({block: 'center'});
+        return;
+      }
+    })
+  }
+
+  scrollToNavItem();