References landing page (#264)

* references page

* RR feedback

* RR feedback

Author: rachel-mack

snooty.toml

@@ -8,10 +8,11 @@ toc_landing_pages = [
     "/security/authentication",
     "/data-formats",
     "/connect/connection-options",
-    "crud",
+    "/crud",
     "/crud/query",
     "/crud/update",
-    "/monitoring-and-logging"
+    "/monitoring-and-logging",
+    "/reference"
 ]
 
 intersphinx = [

source/reference.txt

@@ -12,4 +12,13 @@ Reference
    Compatibility </reference/compatibility>
    Upgrade Guides </reference/upgrade>
    Migrate to PyMongo Async </reference/migration>
-   Previous Versions </reference/previous-versions>
+   Previous Versions </reference/previous-versions>
+
+To find information about versioning, upgrading your driver, and migrating to
+the asynchronous driver, see the following pages:
+
+ - :ref:`Release Notes <pymongo-release-notes>`
+ - :ref:`Compatibility <pymongo-compatibility>`
+ - :ref:`Upgrade Guides <pymongo-upgrade>`
+ - :ref:`Migrate to PyMongo Async <pymongo-async-migration>`
+ - :ref:`Previous Versions <pymongo-previous-versions>`