rjk::duck delivers zero-boilerplate C++26 type erasure

This project perfectly demonstrates the paradigm-shifting potential of upcoming C++26 reflection capabilities, turning notoriously complex C++ design patterns into elegant, ergonomic code.

* Boilerplate Elimination: By using static reflection to handle vtable generation, it drastically reduces the manual coding and maintenance burden associated with custom type erasure.

* Bleeding Edge C++: Its reliance on experimental C++26 reflection makes it a fascinating preview of the language's future, though it currently limits adoption to specific compiler branches (gcc with reflection support).

* Ergonomic Polymorphism: It achieves true duck-typing in C++, providing a much more readable and intuitive interface mechanism without sacrificing the underlying performance expectations of the language.