ci: add GitHub Actions workflow for automated testing

Author: kadevland

.github/workflows/tests.yml

@@ -0,0 +1,38 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php: [8.2, 8.3, 8.4]
+
+    name: PHP ${{ matrix.php }} - Laravel 12
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv
+          coverage: xdebug
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-interaction
+
+      - name: Execute tests
+        run: vendor/bin/phpunit
+
+      - name: Upload coverage to Codecov (PHP 8.4 only)
+        if: matrix.php == '8.4'
+        uses: codecov/codecov-action@v3