add cli for usage and benchmarking

src/main.rs

@@ -1,32 +1,7 @@
-extern crate cat2text;
-use cat2text::base4;
-use std::io::{self, stdout, Write};
+#[cfg(feature = "bin")]
+mod cli;
 
 fn main() {
-    let stdin = io::stdin();
-    let mut input;
-
-    loop {
-        println!("Pick your translation:");
-        println!("1) cat to text");
-        println!("2) text to cat");
-        input = "".to_string();
-        stdin.read_line(&mut input).unwrap();
-        print!("~> ");
-        stdout().flush().unwrap();
-        let trimmed = input.trim();
-        if trimmed == "1".to_string() {
-            input = "".to_string();
-            stdin.read_line(&mut input).unwrap();
-            println!("{}", base4::decode(input.trim().to_string()));
-        } else if trimmed == "2".to_string() {
-            input = "".to_string();
-            stdin.read_line(&mut input).unwrap();
-            println!("{}", base4::encode(input.trim().to_string()));
-        } else {
-            println!("Invalid input, exiting...");
-            break;
-        }
-        println!();
-    }
-}
+    #[cfg(feature = "bin")]
+    cli::run()
+}