feat(docs): add google analytics & cookie consent

Author: martonilles

mkdocs.yml

@@ -64,8 +64,18 @@ extra:
     - icon: fontawesome/brands/linkedin
       link: https://www.linkedin.com/company/onekey-sec/
       name: ONEKEY on LinkedIn
-
+  analytics:
+    provider: google
+    property: G-RQC2V8NDHT
+  consent:
+    title: Cookie consent
+    description: >-
+      We use cookies to recognize your repeated visits and preferences, as well
+      as to measure the effectiveness of our documentation and whether users
+      find what they're searching for. With your consent, you're helping us to
+      make our documentation better.
 
 copyright: >
   Copyright © 2021 - 2022 ONEKEY GmbH.
   | <a href="/privacy/">Privacy policy</a>
+  | <a href="#__consent">Change cookie settings</a>