Text this: Bis(μ-thiosemicarbazide-κ3N1,S:S;κ3S:N1,S)bis[(dimethylformamide-κO)(thiosemicarbazide-κ2N1,S)cadmium(II)] tetrakis(2,4,6-trinitrophenolate): synthesis, crystal structure and Hirshfeld surface analysis