✨ ERP：完成 payment 付款单的逻辑 100%

yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/collection/CollectionUtils.java

@@ -311,4 +311,8 @@ public class CollectionUtils {
         return obj == null ? Collections.emptyList() : Collections.singleton(obj);
     }
 
+    public static <T> List<T> newArrayList(List<List<T>> list) {
+        return list.stream().flatMap(Collection::stream).collect(Collectors.toList());
+    }
+
 }