optimize page directory structure

Currently, files located in the src/pages directory automatically generate a url. But sometimes we don't need it, e.g. `https://seata.io/zh-cn/home/feature/`
目前，位于src/pages目录下的文件都会自动生成一个url。但有时候我们并不需要，如：`https://seata.io/zh-cn/home/feature/`

Pages that do not require a separate url need to be moved to the components directory.
需要将不需要单独生成url的页面移动到components目录中