Add GitHub Actions workflow for running tests

- Run tests on push to main/master branches
- Run tests on pull requests to main/master
- Run tests when new version tags (v*) are created
- Test matrix: PHP 8.2, 8.3, 8.4 with Laravel 11.x and 12.x

Author: claude

.github/workflows/tests.yml

@@ -0,0 +1,59 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+      - master
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - main
+      - master
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest]
+        php: [8.2, 8.3, 8.4]
+        laravel: [11.*, 12.*]
+        stability: [prefer-stable]
+        include:
+          - laravel: 11.*
+            testbench: 9.*
+          - laravel: 12.*
+            testbench: 10.*
+
+    name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv
+          coverage: none
+
+      - name: Setup problem matchers
+        run: |
+          echo "::add-matcher::${{ runner.tool_cache }}/php.json"
+          echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+      - name: Install dependencies
+        run: |
+          composer require "laravel/framework:${{ matrix.laravel }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
+          composer update --${{ matrix.stability }} --prefer-dist --no-interaction
+
+      - name: List installed dependencies
+        run: composer show -D
+
+      - name: Execute tests
+        run: vendor/bin/pest --ci