Make_lattice: Add option for larger nnlist

[jonasschwab]

This feature adds an optional argument to subroutine Make_lattice to have larger nnlist and nnlistk.

It also improves the Doxygen of the lattice slightly.

[Copilot]

Pull request overview

This PR extends Make_lattice in Lattices_v3 with an optional argument to control the allocation/index range of Latt%nnlist and Latt%nnlistk, and refreshes the Doxygen documentation for that routine (plus a copyright year update).

Changes:

• Add optional nnlist_range_in argument to Make_lattice and allocate nnlist/nnlistk with bounds -nnlist_range:nnlist_range.
• Add/expand Doxygen documentation for Make_lattice.
• Update copyright header year.

Comments suppressed due to low confidence (1)

Libraries/Modules/lattices_v3_mod.F90:316

• With nnlist_range_in > 1, the displacement d_p can be multiple unit cells away. The current fixed 4× npbc calls were sufficient for the old -1:1 range, but are not guaranteed to wrap larger displacements back into the fundamental domain; this can produce nnr1/nnr2 outside Latt%invlist bounds. Wrap x_p using a number of npbc iterations that scales with nnlist_range.

                    call npbc(x1_p, x_p , Latt%L1_p, Latt%L2_p)
                    call npbc(x_p , x1_p, Latt%L1_p, Latt%L2_p)
                    call npbc(x1_p, x_p , Latt%L1_p, Latt%L2_p)
                    call npbc(x_p , x1_p, Latt%L1_p, Latt%L2_p)

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