Interpolation state check is fixed to mark as valid only ordered sequences of poles.
Refactoring of Approx_SameParameter.cxx.
Test case is added.
Test cases are updated to the new behavior.
Update of testing cases
Calculating the offset vertices by the superposition of intersection vertices
between pairs of edges (BRepOffset_Inter2d::FuseVertices()).
To obtain stable result when calculating the superposition of vertices
they are sorted (BOPTools_AlgoTools::MakeVertex()).
The support of vertices has been added in nexplode command.
Small correction of tests cases for issue CR27540
