feat: add lazyContainer comp and demo

CHANGELOG.zh_CN.md

@@ -8,6 +8,7 @@
 - 表单新增 submitOnReset 控制是否在重置时重新发起请求
 - 表格新增`sortFn`支持自定义排序
 - 新增动画组件及示例
+- 新增懒加载/延时加载组件及示例
 
 ### ✨ Refactor
 

src/components/Container/index.ts

@@ -1,5 +1,5 @@
 export { default as ScrollContainer } from './src/ScrollContainer.vue';
 export { default as CollapseContainer } from './src/collapse/CollapseContainer.vue';
-export { default as LazyContainer } from './src/LazyContainer';
+export { default as LazyContainer } from './src/LazyContainer.vue';
 
 export * from './src/types.d';