Support Annotation-style tags

[mvriel]

Tags like @Route("/anonymization_preset", name="anonymization_preset_") show the part between parenthesis as part of the description. It would be more convenient to make this a first-class citizen as now this conflicts with the rule that descriptions may be parsed as Markdown documents.

See https://github.com/phpDocumentor/phpDocumentor/issues/2081 for more information