[Commands] Add #petitems Command. (#1823)

- Add #petitems command to show a person's pet items if they have access to the command.
- Adds a default false parameter to QueryLoot for NPCs that keeps messages and logic from being ran on pets for no reason.
- Cleaned up message a bit for loot and stuff.
- Remove check for loottable ID when using #npcstats for NPCs that get items from a script or otherwise.

zone/gm_commands/petitems.cpp

@@ -0,0 +1,25 @@
+#include "../client.h"
+
+void command_petitems(Client *c, const Seperator *sep)
+{
+	if (!c->GetPet()) {
+		c->Message(Chat::White, "You must have a pet to use this command.");
+		return;
+	}
+	
+	auto pet = c->GetPet()->CastToNPC();
+	auto loot_list = pet->GetLootList();
+	if (!loot_list.empty()) {
+		pet->QueryLoot(c, true);
+		c->Message(
+			Chat::White,
+			fmt::format(
+				"Your pet has {} item{}.",
+				loot_list.size(),
+				loot_list.size() != 1 ? "s" : ""
+			).c_str()
+		);
+	} else {
+		c->Message(Chat::White, "Your pet has no items.");
+	}
+}