docs: add code health badge to README

- Add Code Health badge to the README.md file
- The badge indicates the code quality and health status of the project

README.md

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   <span>The next generation animation engine for Vue ecosystem.</span>
 </div>
 
+![Code Health](https://devcloud.cn-north-4.huaweicloud.com/api/codechecknew/api/codeartscheck-portalservice/v4/task/735dea0b1f8d4aabacba497208396c17/code-health-svg?job_id=2783a14fa8a34119b99d8e56330c30c6&locale=en-us)
 # 📒 Introduction
 
 vue-motion is a modern animation engine like Python's Manim for Vuejs ecosystem, it provide lots of widget to help users produce animation and video rapidly. And it has a high scalability, which means you can easily create you own animation style.