Merge commit 'b9112977b074d67d6c83f04af36b6dabdf1d92c6' as 'external/json'

external/json/tests/cmake_fetch_content/project/main.cpp

@@ -0,0 +1,16 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.11.3
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2023 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#include <nlohmann/json.hpp>
+
+int main(int argc, char** argv)
+{
+    nlohmann::json j;
+
+    return 0;
+}