Attempt to add PHPStan messages to CI

Jenkinsfile

@@ -34,6 +34,13 @@ pipeline {
 				sh 'php ./vendor/bin/phpunit --colors=never'
 			}
 		}
+		stage('Code Cleanliness') {
+			agent any
+			steps {
+				sh 'php ./vendor/bin/phpstan analyse src/ -l max -c phpstan.neon -n --no-ansi --no-progress --error-format=checkstyle | awk '{$1=$1;print}' > build/logs/checkstyle.xml'
+				checkstyle 'build/logs/checkstyle.xml'
+			}
+		}
 		stage('Coverage') {
 			agent any
 			steps {