[QA] added phpstan dist config

[thePanz]

@connorhu I added something like this to exclude files not relevant for phpstan

parameters:
    excludePaths:
        analyse:
            - lib/vendor/swiftmailer/
            - lib/task/symfony/lime_symfony.php
            - lib/task/symfony/sfSymfonyTestTask.class.php
            - lib/task/generator/skeleton/
            # Templates for errors
            - lib/exception/data/
            # Templates for classes
            - lib/plugins/sfDoctrinePlugin/data/generator/
            - lib/plugins/sfDoctrinePlugin/lib/vendor/doctrine/
            # Templates for application
            - lib/plugins/sfDoctrinePlugin/test/functional/fixtures/apps/

[connorhu]

@thePanz Thank you! Updated the config. Should we do the same as doctrine1? (php7.4 and php8.3 simultan tests)