(core): implements copy for mesh iterators
Description
Currently, std::copy
cannot be used with mesh iterators because the PointInfo and CellInfo structures does not implements an affectation operator.
It can be very useful to use std::copy
with the mesh iterators.
Proposal
Implements operator=()
on Mesh iterators internal structures (PointInfo and CellInfo).
Also improve the unit tests to check the copy.