mck - add deprecation notice and add linkages

Author: nammn

README.md

@@ -1,3 +1,10 @@
+> **DEPRECATED:** This repository is no longer maintained. Please use the new repository at [mongodb/mongodb-kubernetes](https://github.com/mongodb/mongodb-kubernetes) instead.
+>
+> For more information on this decision - what it means and entails - see the [announcement](https://github.com/mongodb/mongodb-kubernetes/releases/tag/v1.0.0) and our [public documentation](https://www.mongodb.com/docs/kubernetes-operator/).
+>
+> A detailed migration guide is available to help you transition smoothly - see [guide](https://github.com/mongodb/mongodb-kubernetes/blob/master/docs/migration/community-operator-migration.md). There will be no functional changes in the new repository - only a better and unified experience as well as improved visibility into the development process.
+
+
 # MongoDB Community Kubernetes Operator #
 
 <img align="right" src="https://mongodb-kubernetes-operator.s3.amazonaws.com/img/Leaf-Forest%402x.png">