#19 Rename ahoy test stylelintprepare into preparecorefordev

Remove deprecated testsuite classes and replace them in default config with testsuites from Drupal core

- PHP >= 8.1
- Composer >= 2
Code cleanup

#15 Change PHPCS standard from DrupalPractice to Drupal

If module to run PHPStan on has a file .phpstan.neon than will be used for config instead of the default