log(composer): Log check_path_str value when error

harmony_composer/src/main.rs

@@ -98,7 +98,9 @@ async fn main() {
                     .expect("couldn't check if path exists")
                 {
                     true => (),
-                    false => todo!("implement couldn't find path logic"),
+                    false => todo!(
+                        "path {check_script_str} not found. Other paths currently unsupported."
+                    ),
                 };
 
                 let check_output = Command::new(check_script)