fix ListCommand: update for Symfony >=5 exit status

[joshtrichards]

Fixes #1101

Return types required in Symfony >=5: https://symfony.com/blog/new-in-symfony-4-4-console-improvements#make-it-mandatory-to-return-the-command-exit-status

[joshtrichards]

Lint failure is due to this repo not pinning the PHP version whereas we pin it to v8.1 in server:

guests/.github/workflows/lint-php-cs.yml

Line 34 in b8af7cc

php-version: ${{ steps.versions.outputs.php-max }}

https://github.com/nextcloud/server/blob/36e0b027121e05070e71a06752f4e942d2b72217/.github/workflows/lint-php-cs.yml#L53

Using PHP 8.3 with php-cs-fixer v3.22 won't work since v3.40.0 looks to be the first release with official PHP 8.3 support:

 php-cs-fixer fix --dry-run --diff
PHP needs to be a minimum version of PHP 7.4.0 and maximum version of PHP 8.2.*.
Current PHP version: 8.3.2.

https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/releases/tag/v3.40.0

[nickvergessen]

Lint failure is unrelated, but it's not a problem of the action, but the used cs-fixer version needs a bump.

Dependabot PR is not coming as there are too many open

[github-actions]

Hello there,
Thank you so much for taking the time and effort to create a pull request to our Nextcloud project.

We hope that the review process is going smooth and is helpful for you. We want to ensure your pull request is reviewed to your satisfaction. If you have a moment, our community management team would very much appreciate your feedback on your experience with this PR review process.

Your feedback is valuable to us as we continuously strive to improve our community developer experience. Please take a moment to complete our short survey by clicking on the following link: https://cloud.nextcloud.com/apps/forms/s/i9Ago4EQRZ7TWxjfmeEpPkf6

Thank you for contributing to Nextcloud and we hope to hear from you soon!