Add Native XComponent guidelines

Signed-off-by: NWangJiazhen <wangjiazhen4@huawei.com>
Change-Id: Ia80431830812d115962c242619820f067a0feb43

zh-cn/application-dev/napi/Readme-CN.md

@@ -8,3 +8,4 @@
 - [使用MindSpore Lite进行离线模型的转换及推理](mindspore-lite-offline-model-guidelines.md)
 - [Neural Network Runtime对接AI推理框架开发指导](neural-network-runtime-guidelines.md)
 - [Purgeable memory开发指导](purgeable-memory-guidelines.md)
+- [XComponent开发指导](xcomponent-guidelines.md)
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