🌐 Register Urdu (ur) in supported languages and header selector

- Add "ur" to SUPPORTED_LANGS in scripts/docs.py so the build includes Urdu docs
- Add Urdu to the alternate language list in docs/en/mkdocs.yml for the header language selector

Co-Authored-By: Claude Opus 4.6 <[email protected]>

docs/en/mkdocs.yml

@@ -338,6 +338,8 @@ extra:
     name: tr - Türkçe
   - link: /uk/
     name: uk - українська мова
+  - link: /ur/
+    name: ur - اردو
   - link: /zh/
     name: zh - 简体中文
   - link: /zh-hant/

scripts/docs.py

@@ -30,6 +30,7 @@ SUPPORTED_LANGS = {
     "ru",
     "tr",
     "uk",
+    "ur",
     "zh",
     "zh-hant",
 }