feat: reimplement cycles newtype

src/timer.rs

@@ -1,8 +1,16 @@
+use crate::instruction::Cycles;
+
 #[derive(Debug, Clone, Copy)]
 pub struct Timer {
     pub control: TimerControl,
 }
 
+impl Timer {
+    pub fn step(&mut self, _cycles: Cycles) {
+        //
+    }
+}
+
 impl Default for Timer {
     fn default() -> Self {
         Self {