Add debug printing macros and replace print statements with %print_debug in multiple files

Util/macros.asm

@@ -0,0 +1,12 @@
+; Defines common macros for the project.
+
+; Set to 1 to enable debug printing, 0 to disable.
+!DEBUG = 1
+
+; Prints a message and the current PC value during assembly, but only if !DEBUG is enabled.
+; Usage: %print_debug("My message")
+macro print_debug(message)
+  if !DEBUG == 1
+    print "<message> ", pc
+  endif
+endmacro