Multidimensional sample

[Beforerr]

Right now, sample only works with Hist1D, I am wondering if there is any reason to not support 2d/3d?

Also, I feel like we could directly extend StatsBase.sample, since sample is exported and may conflict when user also uses StatsBase

[Moelf]

I am wondering if there is any reason to not support 2d/3d?

the main reason nobody so far has needed it

StatsBase.sample, since sample

this is a great idea

[Beforerr]

I see, then I will create a PR for it (actually quite simple).