Feature: add nameserver-policy override

design/src/premium/java/com/github/kr328/clash/design/OverrideSettingsDesign.kt

@@ -379,6 +379,15 @@ class OverrideSettingsDesign(
                 placeholder = R.string.dont_modify,
                 configure = dnsDependencies::add,
             )
+            
+            editableTextMap(
+                value = configuration.dns::nameserverPolicy,
+                keyAdapter = TextAdapter.String,
+                valueAdapter = TextAdapter.String,
+                title = R.string.name_server_policy,
+                placeholder = R.string.dont_modify,
+                configure = dnsDependencies::add,
+            )
 
             dns.listener?.onChanged()
         }
@@ -389,4 +398,4 @@ class OverrideSettingsDesign(
     fun requestClear() {
         requests.offer(Request.ResetOverride)
     }
-}
+}