chore: update README

README.md

@@ -1 +1,32 @@
 # Occult Crypto Library
+
+[![License](https://img.shields.io/github/license/occult-app/crypto?style=for-the-badge)](https://github.com/occult-app/crypto/blob/master/LICENSE)
+[![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/occult-app/crypto/test.yml?style=for-the-badge)](https://github.com/occult-app/crypto/actions)
+[![Sonar Quality Gate](https://img.shields.io/sonar/quality_gate/occult-app_crypto?server=https%3A%2F%2Fsonarcloud.io&style=for-the-badge)](https://sonarcloud.io/project/overview?id=occult-app_crypto)
+[![Sonar Coverage](https://img.shields.io/sonar/coverage/occult-app_crypto?server=https%3A%2F%2Fsonarcloud.io&style=for-the-badge)](https://sonarcloud.io/project/overview?id=occult-app_crypto)
+
+Occult's client library. It encompasses all cryptographic operations and processes outlined in the [security whitepaper](https://docs.google.com/document/d/1dV4tq5osFdlw7ICn_SS-hcaO9wuRlCqD_wv8IKnSgb8/edit?usp=sharing).
+
+## Usage
+
+```shell
+npm install @occult-app/crypto
+```
+
+A standalone file [occult-app-crypto.js](https://github.com/occult-app/crypto/releases) is also available.
+
+## About
+
+### License
+
+GNU GPL v3.0 License
+
+See [LICENSE](https://github.com/occult-app/crypto/blob/master/LICENSE) file.
+
+### Authors
+
+**The Occult Team** :
+
+* Ewan Rakotoanosy - [@rakotoew](https://github.com/rakotoew)
+* Romain Theodet - [@RomainTHD](https://github.com/RomainTHD)
+* Yohann Thepaut - [@ythepaut](https://github.com/ythepaut)