Polygonal_surface_reconstruction: unknown group in documentation

[albert-github]

Analogous to the issues #7691, #7692 and #7693 adding a warning to doxygen gives me the warning

Polygonal_surface_reconstruction/include/CGAL/Polygonal_surface_reconstruction.h:53: warning: Found non-existing group 'PkgPolygonalSurfaceReconstruction' for the command '@ingroup', ignoring command

• where does this \ingroup belong to or should the line be removed?

[afabri]

I think we have to add the suffix Ref to 'PkgPolygonalSurfaceReconstruction' and the same in the other reported issues. @sloriot do you agree?

[albert-github]

With Ref could be OK as the \defgroup with Ref exists:

• PkgPolygonalSurfaceReconstruction
• PkgSurfaceMeshParameterization (Surface_mesh_parameterization: unknown group in documentation #7793)

Not OK no \defgroup (or \addtogroup) with Ref

• PkgAlgebraicFoundationsInteroperabilityConcepts (Algebraic_foundations: unknown group in documentation #7788) though PkgAlgebraicFoundationsRef and PkgAlgebraicFoundationsAlgebraicStructuresConcepts exist
• PkgMinkowskiSum2Classes (Minkowski_sum_2: unknown group in documentation #7790), PkgMinkowskiSum2Ref exists
• PkgSolverInterfaceRefLS (Solver_interface: unknown group in documentation #7792), PkgSolverInterfaceRef and PkgSolverInterfaceLS exist

The Kernel_23 problem looks to me completely different (#7789)