Translation zh (#1646)

* add state and callback pattern

* add command and template-method pattern

* add iterator pattern

* add bridege and DI pattern

* fix issue #1600

* add converter,proxy,visitor pattern

* add caching,composite,delegation,dirty-flag,interpreter patterns

* add dao and producer-consumer

* add dto and provate class data pattern

* fix #1646 png path problems

* fix #1646 composite png path case problem

Co-authored-by: Mike <admin@xiaod.info>
Co-authored-by: Subhrodip Mohanta <hello@subho.xyz>

zh/delegation/README.md

@@ -0,0 +1,29 @@
+---
+layout: pattern
+title: Delegation
+folder: delegation
+permalink: /patterns/delegation/
+categories: Structural
+tags:
+ - Decoupling
+---
+
+## 或称
+代理模式
+
+## 目的
+它是一种让对象将某种行为向外部表达，但实际上将实现该行为的责任委托给关联对象的技术。
+
+## 类图
+![alt text](../../delegation/etc/delegation.png "Delegate")
+
+## 适用性
+使用委托模式以实现以下目的
+
+* 降低类的耦合性
+* 组件的行为相同，但是意识到这种情况将来可能会改变。
+
+## 鸣谢
+
+* [Delegate Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Delegation_pattern)
+* [Proxy Pattern: Wikipedia ](https://en.wikipedia.org/wiki/Proxy_pattern)