chore(tools): add badges to README

Author: Tlacenka

README.md

@@ -1,5 +1,9 @@
 # Code PushUp CLI
 
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![CI](https://github.com/code-pushup/cli/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/code-pushup/cli/actions/workflows/ci.yml?query=branch%3Amain)
+[![codecov](https://codecov.io/gh/code-pushup/cli/branch/main/graph/badge.svg?token=Y7V489JZ4A)](https://codecov.io/gh/code-pushup/cli)
+
 🔎🔬 **Quality metrics for your software project.** 📉🔍
 
 1. ⚙️ **Configure what you want to track using your favourite tools.**