common: use prelude in all files

src/common/instructions/args.rs

@@ -1,8 +1,7 @@
 //! Various types of arguments that instructions can take, alongside encoding and decoding logic.
 
-use crate::common::instructions::{RegisterParseError, encode::Encode};
-
-use super::Register;
+use crate::common::instructions::Encode;
+use crate::common::prelude::*;
 
 /// A list of errors that can be returned when decoding instruction arguments.
 #[derive(Debug)]