feat: clearly mark template code

src/bin/download.rs

@@ -1,3 +1,7 @@
+/*
+ * This file contains template code.
+ * There is no need to edit this file unless you want to change template functionality.
+ */
 use std::io::Write;
 use std::path::PathBuf;
 use std::{env::temp_dir, io, process::Command};

src/bin/scaffold.rs

@@ -1,3 +1,7 @@
+/*
+ * This file contains template code.
+ * There is no need to edit this file unless you want to change template functionality.
+ */
 use std::{
     fs::{File, OpenOptions},
     io::Write,