* [docNav] Moved h3 title into nav wrapper
* [docNav] Init styles for doc navigation component
* [docNav] Import doc navigation component into sass.css.scss
* [docNav] Functional to make doc navigation sticky on scroll
* [docNav] Rename js class name and changed from single to double quotes
* [docNav] Change class name to sl-js-nav--is-sticky
* [docNav] renamed doc-navigation to navigation and removed nesting
* [docNav] renamed doc-navigation to navigation
* [docNav] Added carriage return after h3
Tables of contents are now statically rendered in their appropriately
open/closed states, rather than updated via JavaScript, so they render
correctly on the first page load. In order to make the "page sections"
table still usable without JS, this adds a stylesheet in a <noscript>
tag that forces the sections into an open state.
