- adds return type checker
- adds sketches for upcoming decorators
- add first ornament '@only_called_once' WIP
- correct type annotations for decorators
- return func value on warning still!
- type annotations were erroneous
- correct path signatures in tests
- only called once decorator is tested and added enforce
- minor makefile improvements
- fix logo printing
- separate ornaments into helpers, invariants, limiters, markers and runtime_checks
- adds warnings and exception classes for our decorators