Add an areas section.

index.rst

@@ -113,6 +113,14 @@ Community support
 .. Below is the main table-of-content tree of the documentation website.
    It is hidden on the page itself, but it makes up the sidebar for navigation.
 
+.. toctree::
+   :hidden:
+   :maxdepth: 1
+   :caption: Organization
+   :name: sec-organization
+
+   organization/areas
+
 .. toctree::
    :hidden:
    :maxdepth: 1
@@ -185,6 +193,6 @@ Community support
    :caption: Maintainers documentation
    :name: sec-maintainers
 
-   maintainers/about
+   maintainers/introduction
    maintainers/merge_queue
    maintainers/building_releases