feat: Added a default stylesheet for extensions.

site/content/docs.md

@@ -304,8 +304,7 @@ Users can create or override as many partials as they want; several are included
 
 `{{> title }}`
 
-: The title of the current page. It should be placed inside the `<title>` tag. By default, it will appear as
-  `{{ page.title }} | {{ site.title }}`.
+: The title of the current page. It should be placed inside the `<title>` tag. By default, it will appear as `{{ page.title }} | {{ site.title }}`.
 
 `{{> nav }}`
 

site/thor.json

@@ -1,6 +1,6 @@
 {
   "markdown_extensions": {
-    "footnotes": true
+    // "footnotes": true
   },
   "params": {
     "author": {