feat: add derive_more for NumberOrString and ProgramWriter

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/plugins.rs

@@ -5,12 +5,17 @@
 
 use std::io::Write;
 
+use derive_more::{Deref, DerefMut};
+
 /// A wrapper around a child process's stdin that implements the Write trait.
 ///
 /// This struct allows writing data to an external process's standard input
 /// in a way that's compatible with Rust's I/O traits.
+#[derive(Deref, DerefMut)]
 pub struct ProgramWriter {
     /// The stdin handle of a spawned child process
+    #[deref]
+    #[deref_mut]
     pub stdin: std::process::ChildStdin,
 }