Class Breadcrumbs

Crea una lista di Breadcrumb (compatibili con PageHeader, o con il rendering manuale), a partire dalla location corrente in base ai titoli registrati nel NavigationManager

Replaces placeholder patterns, i.e. :id, with real values coming from pathname. Necessary since we need to match all paths, even shorter ones, so we can't just blindly use pathname as-is, but we need to extract a part of it.