feat: add static analysis workflow with PHPStan integration

Author: jenky

.github/workflows/static-analysis.yml

@@ -0,0 +1,26 @@
+name: Static Analysis
+
+on:
+  push:
+    paths:
+      - '**.php'
+      - 'phpstan.dist.neon'
+
+jobs:
+  phpstan:
+    name: phpstan
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.1'
+          coverage: none
+
+      - name: Install composer dependencies
+        uses: ramsey/composer-install@v2
+
+      - name: Run PHPStan
+        run: ./vendor/bin/phpstan --error-format=github

README.md

@@ -126,7 +126,7 @@ If you discover any security related issues, please email contact@lynh.me instea
 
 The MIT License (MIT). Please see [License File](LICENSE.md) for more information.
 
-[ico-version]: https://img.shields.io/packagist/v/jenky/api-error.svg?style=for-the-badge
+[ico-version]: https://img.shields.io/packagist/v/jenky/api-error.svg?logo=packagist&style=for-the-badge
 [ico-license]: https://img.shields.io/badge/license-MIT-brightgreen.svg?style=for-the-badge
 [ico-gh-actions]: https://img.shields.io/github/actions/workflow/status/jenky/api-error/testing.yml?branch=main&label=actions&logo=github&style=for-the-badge
 [ico-codecov]: https://img.shields.io/codecov/c/github/jenky/api-error?logo=codecov&style=for-the-badge