Harden NAND clearing

This takes a more sledgehammer approach, as it seems even tiny minor difference in the NAND structure can cause sync issues. This is even the case if the entire directory tree and every file is identical (I guess order of files internally matters here or whatever). The entire partition will be recreated here with files manually readded as to minimize NAND differences (assuming system files are the same version anyways)

Author: CasualPokePlayer