Update README with Trendshift badge and project info

Add Trendshift badge and project introduction in README.

README.md

@@ -4,6 +4,7 @@
 [![Python](https://img.shields.io/badge/Python-3.10+-blue.svg)](https://www.python.org/)
 [![Claude Code](https://img.shields.io/badge/Claude%20Code-Compatible-purple.svg)](https://claude.ai/claude-code)
 
+<a href="https://trendshift.io/repositories/22487" target="_blank"><img src="https://trendshift.io/api/badge/repositories/22487" alt="lingfengQAQ%2Fwebnovel-writer | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a>
 ## 项目简单介绍
 
 `Webnovel Writer` 是基于 Claude Code 的长篇网文创作系统，目标是降低 AI 写作中的“遗忘”和“幻觉”，支持长周期连载创作。