Add README.md

Author: paulbalandan

README.md

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+# Nexus
+
+[![Unit Tests](https://github.com/NexusPHP/framework/actions/workflows/unit-tests.yml/badge.svg?branch=1.x)](https://github.com/NexusPHP/framework/actions/workflows/unit-tests.yml)
+[![Static Code Analysis](https://github.com/NexusPHP/framework/actions/workflows/static-code-analysis.yml/badge.svg?branch=1.x)](https://github.com/NexusPHP/framework/actions/workflows/static-code-analysis.yml)
+[![Package Tests](https://github.com/NexusPHP/framework/actions/workflows/package-tests.yml/badge.svg?branch=1.x)](https://github.com/NexusPHP/framework/actions/workflows/package-tests.yml)
+[![Deploy Nexus API](https://github.com/NexusPHP/framework/actions/workflows/deploy-nexus-api.yml/badge.svg?branch=1.x)](https://github.com/NexusPHP/framework/actions/workflows/deploy-nexus-api.yml)
+[![Mutation testing badge](https://img.shields.io/endpoint?style=plastic&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2FNexusPHP%2Fframework%2F1.x)](https://dashboard.stryker-mutator.io/reports/github.com/NexusPHP/framework/1.x)