feat: add ignore attribute

[gehrisandro]

This PR allows to ignore certain files or paths from being tested.

# ignore a specific file
vendor/bin/pest --type-coverage --ignore=MyLegacyFile.php

# or a path
vendor/bin/pest --type-coverage --ignore=my/legacy/code

# or multiple files and paths
vendor/bin/pest --type-coverage --ignore=MyLegacyFile.php --ignore=AnotherFile.php --ignore=my/legacy/code

# or comma separated
vendor/bin/pest --type-coverage --ignore=MyLegacyFile.php,AnotherFile.php

This is helpful if you want to enforce a minimal coverage for new code in a legacy project:

vendor/bin/pest --type-coverage --min=100 --ignore=MyLegacyFile.php

There is already a different PR which suggest to add an annotation to ignore individual lines from being tested, but for a legacy application I would prefer to ignore the whole files.

[SanderMuller]

LGTM! I have a folder with SOAP/WSDL generated files that spam my results