Add Google Analytics and feedback form feature.

Note: I haven't added the URL to the feedback form yet.

mkdocs.yml

@@ -79,6 +79,23 @@ watch:
 
 extra:
   homepage: https://datamaxiplus.com/
+  analytics:
+    provider: google
+    property: G-X2HTG9B39J
+    feedback:
+      title: Was this page helpful?
+      ratings:
+        - icon: material/emoticon-happy-outline
+          name: This page was helpful
+          data: 1
+          note: >-
+            Thanks for your feedback!
+        - icon: material/emoticon-sad-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>.
   social:
     - icon: fontawesome/brands/github
       link: https://github.com/Bisonai