[docs] Update doc site to improve navigation (#4002)

* [docs] Update doc site to improve navigation

This PR
- Expands the left navigation menu
- Includes a TOC for individual docs on the right
- Includes breadcrumb links on top of the documents for
  faster nav-back to the root folder/any folder
  of the user's choice

* Update website/config.toml

Author: anik120

website/config.toml

@@ -117,10 +117,8 @@ algolia_docsearch = false
 
 # User interface configuration
 [params.ui]
-# Enable to show the side bar menu in its compact state.
-sidebar_menu_compact = true
-#  Set to true to disable breadcrumb navigation.
-breadcrumb_disable = true
+#  Set to true to disable breadcrumb navigation. 
+breadcrumb_disable = false
 #  Set to true to hide the sidebar search box (the top nav search box will still be displayed if search is enabled)
 sidebar_search_disable = true
 #  Set to false if you don't want to display a logo (/assets/icons/logo.svg) in the top nav bar

website/layouts/docs/baseof.html

@@ -13,7 +13,9 @@
           <div class="col-12 col-md-3 col-xl-2 td-sidebar d-print-none">
             {{ partial "sidebar.html" . }}
           </div>
-
+          <div class="d-none d-xl-block col-xl-2 td-toc d-print-none">
+            {{ partial "toc.html" . }}
+          </div>
           <main class="col-12 col-md-9 col-xl-8 pl-md-5 of-docs__wrapper" role="main">
             {{ partial "version-banner.html" . }}
             {{ if not .Site.Params.ui.breadcrumb_disable }}{{ partial "breadcrumb.html" . }}{{ end }}