commands: split response tokenizer into separate file

src/commands/queue/clear.rs

@@ -1,6 +1,7 @@
 use crate::{
+    commands::{Command, Request, RequestParserResult, ResponseParserError},
     request_tokenizer::RequestTokenizer,
-    commands::{Command, Request, RequestParserResult, ResponseAttributes, ResponseParserError},
+    response_tokenizer::ResponseAttributes,
 };
 
 pub struct Clear;