📝 updated documentation for UBJSON functions

doc/examples/from_ubjson.cpp

@@ -0,0 +1,19 @@
+#include <iostream>
+#include "json.hpp"
+
+using json = nlohmann::json;
+
+int main()
+{
+    // create byte vector
+    std::vector<uint8_t> v = {0x7B, 0x69, 0x07, 0x63, 0x6F, 0x6D, 0x70, 0x61,
+                              0x63, 0x74, 0x54, 0x69, 0x06, 0x73, 0x63, 0x68,
+                              0x65, 0x6D, 0x61, 0x69, 0x00, 0x7D
+                             };
+
+    // deserialize it with UBJSON
+    json j = json::from_ubjson(v);
+
+    // print the deserialized JSON value
+    std::cout << std::setw(2) << j << std::endl;
+}