Add projection for classification

src/convex_hull/utils.cpp

src/convex_hull/utils.hpp

src/feature_creation/feature_space/FeatureSpace.cpp

src/feature_creation/feature_space/FeatureSpace.hpp

src/inputs/InputParser.cpp

src/inputs/InputParser.hpp

src/python/__init__.py

src/python/bindings_docstring_keyed.cpp

src/python/feature_creation/FeatureSpace.cpp

src/utils/math_funcs.hpp

src/utils/project.cpp

src/utils/project.hpp