This function downloads the datasets from Zenodo and saves them to a specified directory.
     
    
    Usage
    download_zenodo_data(destdir = NULL)
 
    
    Arguments
- destdir
- (optional) The directory where the files should be saved.
If `NULL`, the files will be saved in a temporary directory. 
 
    
    Value
    A list of file paths for the downloaded datasets.
     
    
    Examples
    if (FALSE) { # \dontrun{
files <- download_zenodo_data()
} # }