docs(README): add tests badge (#299)

Author: alex-mcgovern

README.md

@@ -1,6 +1,9 @@
 # ❖ ui-kit.ai
 
 [![npm](https://img.shields.io/npm/v/%40ui-kit.ai%2Fcomponents.svg?style=flat-square&logo=npm&labelColor=gray&color=gray)](https://npmjs.com/package/%40ui-kit.ai%2Fcomponents)
+[![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/alex-mcgovern/ui-kit.ai/code-quality.yml?branch=main&style=flat&label=tests&labelColor=gray)
+](https://github.com/alex-mcgovern/ui-kit.ai/actions/workflows/code-quality.yml)
+
 
 Professionally designed components, optimized for fast iteration in AI workflows. Accessible, customizable, and ready for production.