What (a) number of child-headed houses has her department assisted in the 2022-23 financial year, (b) is the target for the 2023-24 financial year and (c) plans does her department have in place to ensure that (i) child-headed houses do not struggle with assistance and (ii) the children remain together without being separated due to illegal acts by corrupt social workers who put children under foster care with certain people for self-enrichment of the individuals?