* docs: update cheats doc to clarify Code Type 5 encoding

This change removes references to the "M" nibble for the "Register Address" encoding of Code Type 5 whis is not used in this mode.

In the dword block the "M" has been replaced with a "0"

* docs: update cheats doc to clarify register usage on Code Type 5

This adds additional clarification for "Register Address Encoding" mode of Code Type 5 that the "R" nibble reflects both the destination as well as the base memory address.

* docs: update cheats doc to make Code Types consistent

Code Types are now consistently written in hex notation.