doc: Update README.md

Author: jaywcjlove

core/README.md

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 Encapsulated login page components based on `react-login-page` basic components are provided for quick installation and use. These components help streamline the process of creating login pages and offer flexible APIs for modifying and packaging these components. Welcome to choose from our encapsulated [login pages](https://uiwjs.github.io/react-login-page). We also welcome [recommendations](https://github.com/uiwjs/react-login-page/issues/new/choose) for more cool login pages, which we will turn into React components.
 
+<!--rehype:ignore:start-->
+<br />
+<br />
+<p align="center">
+  <a href="https://uiwjs.github.io/react-login-page">
+    <img alt="react-codemirror logo" src="https://user-images.githubusercontent.com/1680273/234234489-e4ebd508-7efe-41ae-9b61-09a56b803b97.png">
+  </a>
+</p>
+
+<!--rehype:ignore:end-->
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 ## React Login Page
 
 This component is designed to facilitate the development of additional login pages and offers a highly flexible API for modifying packaged login page components.