Measurements of the branching fractions of Ξ<sub>c</sub><SUP>0</SUP> → Λ<i>K<sub>S</sub></i><SUP>0</SUP>, Ξ<i><sub>c</sub></i><SUP>0</SUP> → Σ<SUP>0</SUP><i>K<sub>S</sub></i><SUP>0</SUP>, and Ξ<i><sub>c</sub></i><SUP>0</SUP> → Σ<SUP>+</SUP><i>K</i><SUP>-</SUP> decays at Belle