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

* Split GM commands into their own files

* Code cleanup

zone/gm_commands/opcode.cpp

@@ -0,0 +1,11 @@
+#include "../client.h"
+#include "../../common/patches/patches.h"
+
+void command_opcode(Client *c, const Seperator *sep)
+{
+	if (!strcasecmp(sep->arg[1], "reload")) {
+		ReloadAllPatches();
+		c->Message(Chat::White, "Opcodes for all patches have been reloaded");
+	}
+}
+