Provide checkstyle output for php-cs-fixer with cs2pr

[boesing]

Feature Request

Q	A
New Feature	yes
RFC	no
BC Break	depends

Summary

As of now, the php-cs-fixer tool is just providing some TXT output to the console:

laminas-ci-matrix-action/src/tools.ts

Line 153 in 8ef33fe

command : './vendor/bin/php-cs-fixer fix -v --diff --dry-run',

I'd like to add --format=checkstyle along with | cs2pr so that the output is directly added to the pull request.