[CLI] Add mercs:enable and mercs:disable commands (#3416)

* [CLI] Add `mercs:enable` and `mercs:disable` commands

* Update descriptions

world/cli/mercs_enable.cpp

@@ -0,0 +1,27 @@
+#include "../worlddb.h"
+#include "../../common/database_schema.h"
+
+void WorldserverCLI::MercsEnable(int argc, char **argv, argh::parser &cmd, std::string &description)
+{
+	description = "Enables mercenaries";
+
+	if (cmd[{"-h", "--help"}]) {
+		return;
+	}
+
+	// bootstrap merc tables if they don't exist
+	if (!database.DoesTableExist("merc_types")) {
+		LogInfo("Bootstrapping merc tables");
+		database.SourceSqlFromUrl(
+			"https://raw.githubusercontent.com/EQEmu/Server/master/utils/sql/merc_tables_bootstrap.sql"
+		);
+	}
+	else {
+		LogInfo("Merc tables already exist, skipping bootstrap");
+	}
+
+	LogInfo("Enabling mercs");
+	LogInfo("Setting rule Mercs:AllowMercs to true");
+	RuleManager::Instance()->SetRule("Mercs:AllowMercs", "true", &database, true, true);
+	LogInfo("Mercs enabled");
+}