Merge pull request #72 from episerver/CG-14164-Archive-the-.NET-client-SDK-repository

CG-14164 Archive the .NET client SDK repository

Author: OptiKPS

README.md

@@ -1,3 +1,7 @@
+# Deprecated
+
+The Optimizely Graph Client SDKs have been deprecated. This repository is provided as read-only for reference purposes. It is no longer maintained and no longer receives any updates.
+
 # Optimizely Graph Client SDKs
 
 Welcome to the Optimizely Graph Client SDK repository! This project is dedicated to building GraphQL queries with just a few lines of C# code, aimed at supporting Optimizely's customers in constructing search queries for [Optimizely Graph](https://docs.developers.optimizely.com/platform-optimizely/v1.4.0-optimizely-graph/docs/project-graphql), similar to [Search & Navigation](https://docs.developers.optimizely.com/digital-experience-platform/v1.1.0-search-and-navigation/docs/net-client-api).