This reverts commits 3721dd511d and c4700f03e5 and then combines what was placed into MSGSYSTEM with MsgStd,
because:
1. It's the same dat in the client and should be one list.
2. I used the wrong format for an enum class, like many enum classes we have not yet reformatted
3. I originally planned to fill out the entire dat into the enum so it had a lot of placeholder formatting, and have now decided I won't be here for that
There is further work that can and should be done, but I am not up for it at this time.
- Updated documentation
- Started new enum for system type messages
- Cleaned up message basic enum a little bit (CANT vs CANNOT)
- Use enum for CMessageSystemPacket calls
