i18n: add Azerbaijani (az-AZ) translation (#22792)

Co-authored-by: Tim Baek <tim@openwebui.com>
Co-authored-by: joaoback <156559121+joaoback@users.noreply.github.com>
Co-authored-by: m.shabanov <m.shabanov@asan.local>

src/lib/i18n/locales/languages.json

@@ -15,6 +15,10 @@
 		"code": "ar-BH",
 		"title": "Arabic (Bahrain)"
 	},
+	{
+        "code": "az-AZ",
+        "title": "Azərbaycanca"
+    },
 	{
 		"code": "eu-ES",
 		"title": "Basque (Euskara)"