Add GitHub Actions workflow

Author: ruudk

.github/workflows/ci.yml

@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version: ['8.4']
+
+    name: PHP ${{ matrix.php-version }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v4
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ matrix.php-version }}-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-${{ matrix.php-version }}-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+
+      - name: Check composer.json normalization
+        run: composer normalize --diff --dry-run
+
+      - name: Run PHP CS Fixer
+        run: vendor/bin/php-cs-fixer check --diff
+
+      - name: Run PHPStan
+        run: vendor/bin/phpstan analyse
+