C++26: The New Debugging Header

C++26 introduces a new `` header that standardizes debugging utilities across platforms, eliminating the need for developers to write platform-specific code for breakpoints and debugger detection. The header provides three functions: `std::breakpoint()` for unconditional breakpoints, `std::is_debugger_present()` to check if a debugger is attached, and `std::breakpoint_if_debugging()` as a convenience function that combines both features. This standardization addresses a long-standing pain point where major C++ projects like Boost, Catch2, and Unreal each implemented their own versions of these utilities.