📚 docs(wiki): add full class catalog (17 friendly builders w/ examples, constructors, all 649 AST nodes) - One wiki page per friendly builder (Action, Actor, ..., UseCase), each with a verified usage + definition example and the definition-less ValueError note where applicable - Class-Catalog: index of all 692 exported classes (17 friendly builders, 24 explicit *Builder names, 649 AST node classes) - Constructors: friendly <-> explicit *Builder mapping table + container builders (PackageBuilder, CommentBuilder, ...) - AST-Node-Classes: machine-generated full listing of all 649 AST node classes grouped by family (from dir(sysml2py) filtered to classes) - Home: link the new Class Catalog