Refactor and improve instruction execution behavior

Standardize instruction cycle handling and update return types for better clarity and accuracy. Add cycle count assertions in tests to ensure proper execution timings. Minor formatting fixes and typo corrections throughout the codebase.

.idea/dictionaries/project.xml

@@ -16,6 +16,7 @@
       <w>reti</w>
       <w>rrca</w>
       <w>rrla</w>
+      <w>tama</w>
       <w>vram</w>
     </words>
   </dictionary>