duplicate IFactory.g to split Fit and Core

Base/Utils/IFactory.h

Core/Simulation/SimulationFactory.h

Fit/TestEngine/IFactory.h

GUI/coregui/Models/ItemCatalog.h

GUI/coregui/Views/CommonWidgets/ItemComboWidget.h

Sample/HardParticle/FormFactorTruncatedSphere.cpp

Sample/SoftParticle/FormFactorSphereGaussianRadius.cpp

Sample/StandardSamples/SampleBuilderFactory.h

Tests/Functional/Core/Fitting/PlanFactory.h

Tests/Functional/Fit/Minimizer/PlanFactory.cpp

Tests/Functional/Fit/Minimizer/PlanFactory.h

Wrap/swig/libBornAgainCore.i

Wrap/swig/libBornAgainSample.i

auto/Wrap/doxygenBase.i

auto/Wrap/doxygenFit.i