Function ajour_core::fs::install_addon

pub async fn install_addon(
    addon: &Addon, 
    from_directory: &Path, 
    to_directory: &Path
) -> Result<Vec<AddonFolder>, FilesystemError>

Unzips an Addon archive, and once that is done, it moves the content to the to_directory. At the end it will cleanup and remove the archive.