chore: split up some structs and add comments

src/disasm.rs

@@ -1,14 +1,15 @@
-use core::fmt;
-use std::{fs::File, io::Read, process::exit};
+//! The main dissembling logic.
 
 use crate::aout::Aout;
-use crate::instructions::{Displacement, IByte, IWord, MemoryIndex, ModRmTarget, Operand, Pointer};
+use crate::operands::{Displacement, IByte, IWord, MemoryIndex, ModRmTarget, Operand, Pointer};
 use crate::register::{Register, RegisterId, SegmentRegister};
 use crate::{
     Args,
     instructions::{Instruction, Mnemonic},
 };
 use crate::{modrmb, modrms, modrmv};
+use core::fmt;
+use std::{fs::File, io::Read, process::exit};
 
 #[derive(Debug)]
 /// Generic errors, which are encountered during parsing.