Function zip_convert 

pub fn zip_convert(path: &Path) -> Result<String, Box<dyn Error>>

convert zip into markdown

usage:

use std::path::Path;
use markdownify::zip_convert;

let path = Path::new("path/to/archive.zip");
match zip_convert(&path) {
    Ok(md) => println!("{}", md),
    Err(e) => eprintln!("Error: {}", e)
}