Static Polymorphy in C++

Explains the Curiously Recurring Template Pattern (CRTP) in C++ as an alternative to virtual functions for achieving polymorphism at compile time. Using an Animal/Dog/Cat example, it demonstrates how a base class template can call methods on its derived type via a static cast of `this`, eliminating vtable overhead. Covers trade-offs: CRTP avoids vtable pointer size growth and double pointer indirection at the cost of losing runtime dispatch and producing distinct types per instantiation.