- Addition of `gp_Dir::D` and `gp_Dir2d::D` enums for standard directions (X, Y, Z, NX, NY, NZ)
- Constexpr/noexcept constructors for geometric primitives (circles, cones, cylinders, etc.)
- Enhanced axis placement classes with enum-based constructors
- Replacement of hardcoded direction values throughout the codebase
- Add M_SQRT2 macro in multiple sources and replace runtime sqrt/Sqrt(2) calls with the macro
- Add SQRT_3 constexpr in IGESGraph_Color and Bnd_OBB and replace Sqrt(3) usages
- Make BSplSLib_zero a constexpr array
- Replace a few computed sqrt literals with compile-time constants for clarity and consistency
- Added systematic Boolean operation test coverage using Google Test framework
- Implemented test utilities for shape creation, transformation, and validation
- Migrated existing Draw-based Boolean tests to C++ GTests for better automation
Pasukhin Dmitry