docs: add Ask DeepWiki (#4959)

Author: Alexzjt

README.md

@@ -17,6 +17,7 @@
   <a href="https://www.typescriptlang.org"><img alt="Language" src="https://img.shields.io/badge/language-TypeScript-blue.svg?style=for-the-badge"></a>
   <a href="https://github.com/antvis/x6/pulls"><img alt="PRs Welcome" src="https://img.shields.io/badge/PRs-Welcome-brightgreen.svg?style=for-the-badge"></a>
   <a href="https://x6.antv.antgroup.com"><img alt="website" src="https://img.shields.io/static/v1?label=&labelColor=505050&message=website&color=0076D6&style=for-the-badge&logo=google-chrome&logoColor=f5f5f5"></a>
+  <a href="https://deepwiki.com/antvis/X6"><img src="https://deepwiki.com/badge.svg" alt="Ask DeepWiki"></a>
 </p>
 
 <p align="center">

README.zh-CN.md

@@ -16,6 +16,7 @@
   <a href="https://www.typescriptlang.org"><img alt="Language" src="https://img.shields.io/badge/language-TypeScript-blue.svg?style=for-the-badge"></a>
   <a href="https://github.com/antvis/x6/pulls"><img alt="PRs Welcome" src="https://img.shields.io/badge/PRs-Welcome-brightgreen.svg?style=for-the-badge"></a>
   <a href="https://x6.antv.antgroup.com"><img alt="website" src="https://img.shields.io/static/v1?label=&labelColor=505050&message=website&color=0076D6&style=for-the-badge&logo=google-chrome&logoColor=f5f5f5"></a>
+  <a href="https://deepwiki.com/antvis/X6"><img src="https://deepwiki.com/badge.svg" alt="Ask DeepWiki"></a>
 </p>
 
 <p align="center">