REFAC: Conditionally include SFML only for audio example

Examples/CameraController/CMakeLists.txt

Examples/DeformableBody/CMakeLists.txt

Examples/ExtractSurface/CMakeLists.txt

Examples/GeometryTransforms/CMakeLists.txt

Examples/Graph/CMakeLists.txt

Examples/LaparoscopicToolController/CMakeLists.txt

Examples/MeshIO/CMakeLists.txt

Examples/MshVegaIO/CMakeLists.txt

Examples/ObjectController/CMakeLists.txt

Examples/PBDCloth/CMakeLists.txt

Examples/PBDCollision/CMakeLists.txt

Examples/PBDFluids/CMakeLists.txt

Examples/PBDVolume/CMakeLists.txt

Examples/Picking/CMakeLists.txt

Examples/PlotVectors/CMakeLists.txt

Examples/Rendering/CMakeLists.txt

Examples/SceneManagement/CMakeLists.txt

Examples/Screenshot/CMakeLists.txt

Examples/Viewer/CMakeLists.txt

Examples/VirtualCoupling/CMakeLists.txt