Show the PHPStan version

Also pin to the second to last released version for the GHA as the last one crashes.

(cherry picked from commit bf67a46)

.github/workflows/phpstan.yml

@@ -0,0 +1,28 @@
+name: Run PHPStan
+on:
+  merge_group:
+  pull_request:
+    branches:
+      - main
+      - '[0-9]+.[0-9]+'
+
+jobs:
+  phpstan:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup composer dependencies
+        run: .github/jobs/composer_setup.sh
+      - name: Show the phpstan version
+        run: webapp/vendor/phpstan/phpstan/phpstan --version
+      - uses: php-actions/[email protected]
+        with:
+          configuration: webapp/phpstan.dist.neon
+          path: webapp/src webapp/tests
+          php_extensions: gd intl mysqli pcntl zip
+          autoload_file: webapp/vendor/autoload.php
+          version: composer
+      - uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          path: /tmp/artifacts