- New ClassifierListReader child class UsesReader furnishes boilerplate
  for converting from PetalNode to UMLAssociation with type Dependency.
- In function umbrellify,
  - in handling of objType "Class" create UsesReader on `c' and call
    usesReader.read on `node';
  - in handling of defined diagramType(objType), on handling InheritView
    and RealizeView also handle UsesView setting `t' to
    Uml::AssociationType::Dependency;
  - remove handling of UsesView from handling of AttachView.

CCBUG: 81364