Fix code quality tool configurations and improve documentation

- Fixed phpstan.neon regex pattern for ignoring errors
- Commented out missing Universal sniffs in phpcs.xml
- Updated SonarCloud configuration to disable automatic analysis
- Improved code-quality-checks.md documentation based on feedback
- Added reminder about inline comment periods to .ai-assistant.md

sonar-project.properties

@@ -25,3 +25,6 @@ sonar.php.tests.reportPath=test-report.xml
 
 # Additional parameters
 sonar.verbose=true
+
+# Disable automatic analysis
+sonar.projectKey.analysis.mode=manual