add cookie consent and option to manage cookies (#1997)

* add cookie consent and option to manage cookies

* added cookie svg

---------

Co-authored-by: Roman Dodin <dodin.roman@gmail.com>

mkdocs.yml

@@ -255,10 +255,25 @@ extra:
       link: https://twitter.com/ntdvps
     - icon: fontawesome/brands/discord
       link: https://discord.gg/vAyddtaEV9
+  consent:
+    title: Cookie consent
+    consent:
+    actions:
+      - accept
+      - manage
+      - reject
+    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.
   analytics:
     provider: google
     property: G-368XR9X5MG
 
+copyright: >
+  <span class="twemoji"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20.87 9.5C20.6 9 20 9 20 9h-2V8c0-1-1-1-1-1h-2V6c0-1-1-1-1-1h-1V3c0-1-1-1-1-1a9 9 0 1 0 9 9c0-.5-.04-1-.13-1.5M6.5 12c-.83 0-1.5-.67-1.5-1.5S5.67 9 6.5 9 8 9.67 8  10.5 7.33 12 6.5 12M8 6.5C8 5.67 8.67 5 9.5 5s1.5.67 1.5 1.5S10.33 8 9.5 8 8 7.33 8 6.5M11 18c-.83 0-1.5-.67-1.5-1.5S10.17 15 11 15s1.5.67 1.5 1.5S11.83 18 11 18m.5-5c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5m5 2c-.83 0-1.5-.67-1.5-1.5s.67-1.5 1.5-1.5 1.5.67 1.5 1.5-.67 1.5-1.5 1.5M7 22h2v2H7v-2m4 0h2v2h-2v-2m4 0h2v2h-2v-2Z"></path></svg></span> <a href="#__consent">Cookie settings</a>
+
 extra_css:
   - stylesheets/extra.css