This allows configuration via PHP.
It also combines code sniffer and php cs fixer.
Used commands:
composer remove --dev squizlabs/php_codesniffer
composer req --dev symplify/easy-coding-standard
./vendor/bin/ecs --fix
Allow integrator to limit results in widget to certain languages.
If only one language is allowed, labels will be translated.
Otherwise default system language is used.
E.g. one record will be displayed in multiple languages, it would be
confusing to show him multiple times for each language.
Add TYPO3 extension for phpstan as many things would break within tests.
Relates: #15
