docs(vendor-ccxt): add ccxt into README (No-Trade-No-Life#449)

README.md

@@ -191,6 +191,8 @@ Every vendor is a gateway to connect the external service directly. Your private
 
 - [@yuants/vendor-ctp](apps/vendor-ctp) This connects to the "Comprehensive Transaction Platform" (CTP). The CTP platform was developed by the Shanghai Futures Exchange (SHFE). CTP provides China's future exchanges. To comply with regulations, you might have to request permission from your broker company.
 
+- [@yuants/vendor-ccxt](apps/vendor-ccxt) This connects to the "CryptoCurrency eXchange Trading Library" (CCXT). CCXT is a JavaScript / Python / PHP cryptocurrency trading library that supports many cryptocurrency exchanges and trading markets. You can use it to trade cryptocurrencies.
+
 <p align="right">(<a href="#readme-top">back to top</a>)</p>
 
 ## Contributing