Docs: add Mintlify language navigation

docs/docs.json

@@ -843,6 +843,10 @@
     }
   ],
   "navigation": {
+    "languages": [
+      {
+        "language": "en",
+        "default": true,
         "groups": [
           {
             "group": "Start Here",
@@ -861,7 +865,11 @@
           },
           {
             "group": "Help",
-        "pages": ["help/index", "help/troubleshooting", "help/faq"]
+            "pages": [
+              "help/index",
+              "help/troubleshooting",
+              "help/faq"
+            ]
           },
           {
             "group": "Install & Updates",
@@ -994,7 +1002,13 @@
           },
           {
             "group": "Web & Interfaces",
-        "pages": ["web/index", "web/control-ui", "web/dashboard", "web/webchat", "tui"]
+            "pages": [
+              "web/index",
+              "web/control-ui",
+              "web/dashboard",
+              "web/webchat",
+              "tui"
+            ]
           },
           {
             "group": "Channels",
@@ -1151,5 +1165,20 @@
             ]
           }
         ]
+      },
+      {
+        "language": "zh-Hans",
+        "groups": [
+          {
+            "group": "开始",
+            "pages": [
+              "zh-CN/index",
+              "zh-CN/start/getting-started",
+              "zh-CN/start/wizard"
+            ]
+          }
+        ]
+      }
+    ]
   }
 }