[Commands] Add #viewcurrencies Command. (#1844)

* [Commands] Add #viewcurrencies Command.
- Add #viewcurrencies command to view your or your target's currencies (Money, Crystals, Alternate Currency, LDoN, and PVP).
- Add GetLDoNThemeName() helper method.

* Update viewcurrencies.cpp

* Cleanup name of map method.

* Cleanup.

zone/CMakeLists.txt

@@ -547,6 +547,7 @@ SET(gm_commands
     gm_commands/untraindiscs.cpp
     gm_commands/uptime.cpp
     gm_commands/version.cpp
+    gm_commands/viewcurrencies.cpp
     gm_commands/viewnpctype.cpp
     gm_commands/viewpetition.cpp
     gm_commands/viewzoneloot.cpp