INT: Added tutorial cases showcasing new multi-paddle wave maker extensions

...interFoam/laminar/waves/waveMakerMultiPaddleFlap/0.orig/U

...laminar/waves/waveMakerMultiPaddleFlap/0.orig/alpha.water

...rFoam/laminar/waves/waveMakerMultiPaddleFlap/0.orig/p_rgh

...r/waves/waveMakerMultiPaddleFlap/0.orig/pointDisplacement

...interFoam/laminar/waves/waveMakerMultiPaddleFlap/Allclean

...e/interFoam/laminar/waves/waveMakerMultiPaddleFlap/Allrun

...r/waves/waveMakerMultiPaddleFlap/constant/dynamicMeshDict

...terFoam/laminar/waves/waveMakerMultiPaddleFlap/constant/g

...ves/waveMakerMultiPaddleFlap/constant/transportProperties

...es/waveMakerMultiPaddleFlap/constant/turbulenceProperties

...ar/waves/waveMakerMultiPaddleFlap/constant/waveProperties

...minar/waves/waveMakerMultiPaddleFlap/system/blockMeshDict

...laminar/waves/waveMakerMultiPaddleFlap/system/controlDict

...ar/waves/waveMakerMultiPaddleFlap/system/decomposeParDict

...m/laminar/waves/waveMakerMultiPaddleFlap/system/fvSchemes

.../laminar/waves/waveMakerMultiPaddleFlap/system/fvSolution

...minar/waves/waveMakerMultiPaddleFlap/system/setFieldsDict

...terFoam/laminar/waves/waveMakerMultiPaddlePiston/0.orig/U

...minar/waves/waveMakerMultiPaddlePiston/0.orig/alpha.water

...oam/laminar/waves/waveMakerMultiPaddlePiston/0.orig/p_rgh