[10322] In chat command handlers use char* arg instead "const char*"

[newsbot]

<pre>m src/game/Chat.cpp
m src/game/Chat.h
m src/game/Level0.cpp
m src/game/Level1.cpp
m src/game/Level2.cpp
m src/game/Level3.cpp
m src/game/debugcmds.cpp
m src/mangosd/CliRunnable.cpp
m src/shared/revision_nr.h

[10322] In chat command handlers use char* arg instead "const char*"

We in any case modify args string content at parsing in commands,
so cast it to char* early. This let avoid lot later casts.

Some other code style exist in related code.</pre>



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