Docs: added details and link to wiki from imgui_stdlib to increase discoverability.

misc/cpp/README.txt

@@ -9,5 +9,5 @@ imgui_scoped.h
   Try by merging: https://github.com/ocornut/imgui/pull/2197
   Discuss at: https://github.com/ocornut/imgui/issues/2096
 
-See more C++ related extension on Wiki
+See more C++ related extension (fmt, RAII, syntaxis sugar) on Wiki:
   https://github.com/ocornut/imgui/wiki/Useful-Extensions#cness

misc/cpp/imgui_stdlib.cpp

@@ -4,6 +4,9 @@
 // Changelog:
 // - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
 
+// See more C++ related extension (fmt, RAII, syntaxis sugar) on Wiki:
+//   https://github.com/ocornut/imgui/wiki/Useful-Extensions#cness
+
 #include "imgui.h"
 #include "imgui_stdlib.h"
 

misc/cpp/imgui_stdlib.h

@@ -4,6 +4,9 @@
 // Changelog:
 // - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
 
+// See more C++ related extension (fmt, RAII, syntaxis sugar) on Wiki:
+//   https://github.com/ocornut/imgui/wiki/Useful-Extensions#cness
+
 #pragma once
 
 #include <string>