`@Command`-annotated methods are not added if enclosing class does not have `@Command` annotation

[remkop]

@Command-annotated methods are not added if enclosing class does not have @Command annotation.

Example:

class App {
    @Option(names = "-a", scope = INHERIT) boolean a;
    @Command void sub() {}
}
assertNotNull(new CommandLine(new App()).getSubcommands().get("sub));