v0.4.1

Fixed

• Public macros no longer require downstream crates to depend on frunk_core directly
  Effects!, empty effect sets, spread-based #[effectful] signatures, and internal runner macro expansions now route through corophage's hidden frunk_core re-export.

Added

• Expanded examples and website docs
  Added saga-style order processing, stepwise debugger, and choreographic programming examples, plus website pages for the saga and debugger examples.