[World CLI] Refactor world CLI to be easier to reason about (#2441)

world/cli/database_version.cpp

@@ -0,0 +1,21 @@
+#include "../../common/version.h"
+#include "../../common/json/json.h"
+
+void WorldserverCLI::DatabaseVersion(int argc, char **argv, argh::parser &cmd, std::string &description)
+{
+	description = "Shows database version";
+
+	if (cmd[{"-h", "--help"}]) {
+		return;
+	}
+
+	Json::Value database_version;
+
+	database_version["database_version"]      = CURRENT_BINARY_DATABASE_VERSION;
+	database_version["bots_database_version"] = CURRENT_BINARY_BOTS_DATABASE_VERSION;
+
+	std::stringstream payload;
+	payload << database_version;
+
+	std::cout << payload.str() << std::endl;
+}