readme.md - add animated logo

Author: ramiy

README.md

@@ -1,3 +1,7 @@
+<div align="center">
+    <img width="300" src="https://chartscss.org/assets/img/logo-animation.svg" alt="Charts.css Logo">
+</div>
+
 # ChartsCSS.org
 
 Documentation explaining how to use [charts.css](https://github.com/ChartsCSS/charts.css).