Ortho-chalcogenostannates as ligands: Syntheses, crystal structures, electronic properties, and magnetism of novel compounds containing ternary anionic substructures [M${}_4$([${\mu }_4$-Se)(SnSe${}_4$)${}_4$]${}^{10-}$ (M = Mn, Zn, Cd, Hg), ${}_{\mathrm{\infty }}^3${[Hg${}_4$(${\mu }_4$-Se)(SnSe$\text{\_4\_)}$_3$]$^{6-}$\text{}, or}$^1_{\infty}${[HgSnSe${}_4$]${}^{2-}$}