take bytes path as argument in `komodo.nu` and `cargo run`

this is to make the passing of bytes easier as cargo run wants strings.

src/main.rs

@@ -27,7 +27,7 @@ fn parse_args() -> (Vec<u8>, usize, usize, bool, String, bool, bool, Vec<String>
     let bytes_path = std::env::args()
         .nth(1)
         .expect("expected path to bytes as first positional argument");
-    let bytes = if bytes_path == "" {
+    let bytes = if bytes_path.is_empty() {
         vec![]
     } else {
         std::fs::read(bytes_path).unwrap()