Function finalize_manifest_fat32

unsafe fn finalize_manifest_fat32(
    blk_driver: &mut VirtioBlkDriver,
    config: &BareMetalConfig,
    total_bytes: u64,
    end_sector: u64,
) -> bool

Write manifest to FAT32 ESP filesystem.

Creates /.iso/<name>.manifest file on the ESP. Uses morpheus_core::iso::IsoManifest for compatibility with bootloader scanner.