added build status badge and link to example in readme

Author: Geolm

README.md

@@ -1,5 +1,8 @@
 # leanUI
 
+![Build Status](https://github.com/Geolm/leanUI/actions/workflows/cmake-multi-platform.yml/badge.svg)
+
+
 leanUI is a small immediate-mode UI library written in C99.  
 It’s designed for games and lightweight applications that need a clean, polished interface without bringing in a full framework.
 
@@ -66,6 +69,8 @@ Very simple and effective (no rows, no columns)
 
 ## Example
 
+For a complete and compiling example see [test/test.c](test/test.c)
+
 ```c
 #include "lean_ui.h"