commands: implement common traits for responses

src/commands/queue/addid.rs

@@ -1,3 +1,5 @@
+use serde::{Deserialize, Serialize};
+
 use crate::{
     commands::{
         Command, Request, RequestParserError, RequestParserResult, ResponseAttributes,
@@ -8,6 +10,7 @@ use crate::{
 
 pub struct AddId;
 
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct AddIdResponse {
     pub id: SongId,
 }