refactor: template for including files (#807)

src/config/input.rs

@@ -72,7 +72,7 @@ impl Input {
             texts.push(String::new());
         }
         for (path, contents) in files {
-            texts.push(format!("<!-- include: {path} -->\n\n{contents}\n"));
+            texts.push(format!("`{path}`:\n\n{contents}\n"));
         }
         let (role, with_session, with_agent) = resolve_role(&config.read(), role);
         Ok(Self {