reorganized repo

doc/examples/basic_json.cpp

@@ -0,0 +1,12 @@
+#include <json.hpp>
+
+using namespace nlohmann;
+
+int main()
+{
+    // create a JSON value with default null value
+    json j;
+
+    // serialize the JSON null value
+    std::cout << j << '\n';
+}