[Money Messages] Cleanup quest::givecash(), split, and task reward messages. (#2205)

* [Money Messages] Cleanup quest::givecash(), split, and task reward messages.
- Cleans up all the money messages using ConvertMoneyToString().
- Allows quest::givecash() to have optional parameters other than copper.

* Commification.

* Corpse messages.

* String IDs and cleanup.

zone/gm_commands/givemoney.cpp

@@ -35,7 +35,12 @@ void command_givemoney(Client *c, const Seperator *sep)
 		Chat::White,
 		fmt::format(
 			"Added {} to {}.",
-			ConvertMoneyToString(platinum, gold, silver, copper),
+			ConvertMoneyToString(
+				platinum,
+				gold,
+				silver,
+				copper
+			),
 			c->GetTargetDescription(target)
 		).c_str()
 	);