feat: filename constraint

config.ini.example

docs/pages/docs/changelog/index.md

docs/pages/docs/features/validation/constraints/index.md

src/ApplicationConfiguration.php

src/Command/Watch.php

src/Constraint/FilenameConstraint.php

src/Constraint/FilenameConstraintTest.php

src/ConstraintReason.php

...onfigurationProvider/ApplicationConfigurationProvider.php

...r/ConfigurationProvider/DatabaseConfigurationProvider.php

...vider/ConfigurationProvider/GrpcConfigurationProvider.php

...der/ConfigurationProvider/MailerConfigurationProvider.php

...der/ConfigurationProvider/OAuth2ConfigurationProvider.php

.../ConfigurationProvider/SQLiteVSSConfigurationProvider.php

...ConfigurationProvider/StaticPageConfigurationProvider.php

...der/ConfigurationProvider/SwooleConfigurationProvider.php

...ConfigurationProvider/TranslatorConfigurationProvider.php

src/TwigEsbuildContext.php