Implement division operation for Rectangle, Size and Vector
#2767
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Implement
std::ops::DivforRectangle,SizeandVectorto complement existing multiplication operations.This way users can avoid the roundabout
foo * (1.0 / scaling)to scale aVector, for example.I thought
impl<T> std::ops::Div<Vector<T>> for Rectangle<T>was a bit weird conceptually, but added it for consistency since we already hadimpl<T> std::ops::Mul<Vector<T>> for Rectangle<T>.