Left aligned nav bar pages layout (#6992)

* footer test

* page url

* page url

* page url

* page url

* page url

* page url

* page url

* layout left

* layout left

* shift nav left

* left layout

_config.yml

@@ -25,3 +25,10 @@ aux_links:
   "GitHub":
     - "https://github.com/microsoft/onnxruntime"
 ga_tracking: UA-156955408-1    
+# Footer "Edit this page on GitHub" link text
+gh_edit_link: true # show or hide edit this page link
+gh_edit_link_text: "Edit this page on GitHub"
+gh_edit_repository: "https://github.com/microsoft/onnxruntime" # the github URL for your repo
+gh_edit_branch: "gh-pages" # the branch that your docs is served from
+# gh_edit_source: docs # the source that your files originate from
+gh_edit_view_mode: "tree" # "tree" or "edit" if you want the user to jump into the editor immediately

_includes/footer_custom.html

@@ -0,0 +1,3 @@
+{%- assign url = page.url -%}
+
+<p class="text-small text-grey-dk-100 mb-0">For documentation questions, please <a href="https://github.com/microsoft/onnxruntime/issues/new?labels=component:documentation&title=[Documentation%20Request]&body=%5BEnter%20feedback%20here%5D%0A%0A---%0A%23%23%23%23%20Document%20Details%0A*%20Title%3A%20{{ page.title | url_encode }}%0A*%20Page%3A%20%5B{{ url | absolute_url | url_encode }}%5D({{ url | absolute_url | url_encode }})%0A*%20Page%20Source%3A%20{{ page.name | url_encode }}" target="_blank">file an issue</a></p>

_sass/custom/custom.scss

@@ -0,0 +1,17 @@
+.site-nav, .site-header, .site-footer {
+    width: 100%;
+  }
+  
+  .side-bar {
+    @include mq(lg) {
+      width: $nav-width;
+    }
+  }
+  
+  .main {
+    @include mq(lg) {
+      margin-left: $nav-width;
+    }
+    
+  }
+