Add "was this page helpful?" widget

mkdocs.yml

@@ -45,6 +45,20 @@ extra:
   analytics:
     provider: google
     property: !ENV GOOGLE_ANALYTICS_KEY
+    feedback:
+      title: Was this page helpful?
+      ratings:
+        - icon: material/thumb-up-outline
+          name: This page was helpful
+          data: 1
+          note: >-
+            Thanks for your feedback!
+        - icon: material/thumb-down-outline
+          name: This page could be improved
+          data: 0
+          note: >-
+            Thanks for your feedback! Help us improve this page by
+            using our <a href="..." target="_blank" rel="noopener">feedback form</a>.
 
 # Extensions
 markdown_extensions: