🌐 Initialize Azerbaijani translations (#3941)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

docs/it/mkdocs.yml

@@ -40,6 +40,7 @@ nav:
 - FastAPI: index.md
 - Languages:
   - en: /
+  - az: /az/
   - de: /de/
   - es: /es/
   - fr: /fr/
@@ -89,6 +90,8 @@ extra:
   alternate:
   - link: /
     name: en - English
+  - link: /az/
+    name: az
   - link: /de/
     name: de
   - link: /es/