applies chatgpt suggestions.

...
does not appear to decode everything

core/src/op_info.rs

@@ -0,0 +1,10 @@
+use crate::address_mode::AddressMode;
+use crate::operation::Operation;
+
+#[derive(Debug, Copy, Clone)]
+pub struct OpInfo {
+    pub operation: Operation,
+    pub mode: AddressMode,
+    pub length: u8,
+    pub cycles: u8,
+}