[doc1] Use std_samples and std_simulations in Examples and web doc ()

Examples/specular/AlternatingLayers.py

Examples/specular/AlternatingLayers1.py

Examples/specular/AlternatingLayers2.py

Examples/specular/TOFRWithResolution.py

Examples/specular/TimeOfFlightReflectometry.py

Tests/Examples/CMakeLists.txt

Tests/Examples/PyPersistence.py.in

Tests/ReferenceData/ExamplesMini/AlternatingLayers.int.gz

Wrap/Python/std_samples.py

Wrap/Python/std_simulations.py

cmake/BornAgain/PythonAPI.cmake

hugo/content/py/sample/multilayer.md

hugo/content/py/simulation/reflectometry/_index.md

hugo/content/py/start/modify-script.md

hugo/content/py/start/run.md

hugo/content/py/start/syntax.md