Add test workflow

Author: mrtolouei

.github/workflows/tests.yml

@@ -0,0 +1,17 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.0'
+      - name: Install dependencies
+        run: composer install
+      - name: Run tests
+        run: vendor/bin/pest

README.md

@@ -3,6 +3,10 @@ A lightweight, extendable Laravel package for monitoring the health of internal
 
 Built for developers who care about observability and application resilience.
 
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+[![Tests](https://github.com/mrtolouei/laravel-health-monitor/actions/workflows/tests.yml/badge.svg)](https://github.com/mrtolouei/laravel-health-monitor/actions/workflows/tests.yml)
+[![Latest Stable Version](https://poser.pugx.org/mrtolouei/laravel-health-monitor/v/stable)](https://packagist.org/packages/mrtolouei/laravel-health-monitor)
+
 ## Installation
 Install the package via Composer:
 ```