chore: add CodeRabbit Pull Request Reviews Badge (#1543)

README.md

@@ -4,6 +4,7 @@
 
 [![CircleCI](https://img.shields.io/circleci/project/github/RequestNetwork/requestNetwork/master.svg)](https://circleci.com/gh/RequestNetwork/requestNetwork)
 [![Commit Activity](https://img.shields.io/github/commit-activity/m/RequestNetwork/requestNetwork.svg?color=green)](https://github.com/RequestNetwork/requestNetwork/pulse/monthly)
+![CodeRabbit Pull Request Reviews](https://img.shields.io/coderabbit/prs/github/RequestNetwork/requestNetwork?color=orange)
 
 [Request][website-url] is a decentralized network built on top of Ethereum, which allows anyone, anywhere to request a payment. A full description of the protocol may be found in our [whitepaper][whitepaper-url].