[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/npc.cpp

@@ -693,13 +693,12 @@ void NPC::QueryLoot(Client* to, bool is_pet_query)
 	}
 
 	if (!is_pet_query) {
-		bool has_money = (
-			platinum > 0 ||
-			gold > 0 ||
-			silver > 0 ||
-			copper > 0
-		);
-		if (has_money) {
+		if (
+			platinum ||
+			gold ||
+			silver ||
+			copper
+		) {
 			to->Message(
 				Chat::White,
 				fmt::format(