pub.dev names 'hanzo' and 'base' are taken by unrelated packages;
'hanzo_base' is the correct available name. Renames the library
(lib/hanzo.dart -> lib/hanzo_base.dart), example, and test, and
fixes all package: imports, README, badge, and pubspec repository
to hanzo-dart/base. dart analyze --fatal-infos + dart test green;
pub publish --dry-run clean (0 warnings).
Clean, minimal Dart SDK for Hanzo Base, mirroring @hanzo/base's shape.
Written from scratch — no external backend framework.
Supersedes the archived hanzoai/dart-sdkPB fork.