scale option for all geometry reading

• snappyHexMesh, foamyHexMesh, blockMesh all support scaling geometry upon reading.
• of the surface utilities only:

surfaceConvert
surfaceFeatureConvert
surfaceMeshConvert
surfaceMeshConvertTesting
surfaceMeshExport
surfaceMeshImport
surfaceMeshInfo
surfaceTransformPoints

support it.

• can we extend all others to support it as well? Especially surfaceFeatureExtract.
• also e.g. BCs (pointDisplacement ones), postprocessing