docs: add deprecation tips

DIYgod · web-flow · commit ea3a38609ce3 · 2022-05-06T19:02:01.000+01:00
diff --git a/README.md b/README.md
@@ -1,3 +1,7 @@
+> ⚠️ 
+> 
+> This SDK has been deprecated and we are going to launch a new scheme and supporting facilities soon
+
 <p align="center">
     <p align="center">
         <img src="https://graphics.rss3.workers.dev/" alt="RSS3" width="100">
