feat: add derive_more for NumberOrString and ProgramWriter

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

src/args.rs

@@ -136,10 +136,12 @@ pub struct OptionsArgs {
     pub force: bool,
 }
 
+use derive_more::From;
+
 /**
  * Enum for representing either a number or a string.
  */
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, From)]
 pub enum NumberOrString {
     Number(i64),
     Str(String),