[GM Commands] Split GM Commands Into Separate Files (#1766)

* Split GM commands into their own files

* Code cleanup

zone/gm_commands/stun.cpp

@@ -0,0 +1,65 @@
+#include "../client.h"
+
+void command_stun(Client *c, const Seperator *sep)
+{
+	int arguments = sep->argnum;
+	if (!arguments || !sep->IsNumber(1)) {
+		c->Message(Chat::White, "Usage: #stun [Duration]");
+		return;
+	}
+
+	Mob *target  = c;
+	int duration = static_cast<int>(std::min(std::stoll(sep->arg[1]), (long long) 2000000000));
+
+	if (duration < 0) {
+		duration = 0;
+	}
+
+	if (c->GetTarget()) {
+		target = c->GetTarget();
+		if (target->IsClient()) {
+			target->CastToClient()->Stun(duration);
+		}
+		else if (target->IsNPC()) {
+			target->CastToNPC()->Stun(duration);
+		}
+	}
+	else {
+		c->Stun(duration);
+	}
+
+	std::string stun_message = (
+		duration ?
+			fmt::format(
+				"You stunned {} for {}.",
+				(
+					c == target ?
+						"yourself" :
+						fmt::format(
+							"{} ({})",
+							target->GetCleanName(),
+							target->GetID()
+						)
+				),
+				ConvertSecondsToTime(duration)
+			) :
+			fmt::format(
+				"You unstunned {}.",
+				(
+					c == target ?
+						"yourself" :
+						fmt::format(
+							"{} ({})",
+							target->GetCleanName(),
+							target->GetID()
+						)
+				)
+			)
+	);
+	c->Message(
+		Chat::White,
+		stun_message.c_str()
+	);
+}
+
+