Merge pull request #732 from OpenNMS/jeffg/helm-is-dead-long-live-opg

Added top-line redirect to OPG successor plugin

README.md

@@ -1,3 +1,8 @@
+# This plugin is superseded by the OpenNMS Plugin for Grafana.
+
+Please use the [OpenNMS Plugin for Grafana](https://grafana.com/grafana/plugins/opennms-opennms-app/) instead.
+The OpenNMS Plugin for Grafana is compatible with current Grafana releases, and does not have a naming conflict with the package manager for Kubernetes. To migrate, please follow our [upgrade documentation](https://docs.opennms.com/grafana-plugin/9/installation/upgrading.html).
+
 # OpenNMS Helm - PM/FM Console for Grafana [![CircleCI](https://circleci.com/gh/OpenNMS/grafana-plugin.svg?style=svg)](https://circleci.com/gh/OpenNMS/grafana-plugin)
 
 Helm is a [Grafana](https://grafana.com/) application that allows users to create flexible dashboards using both fault management (FM) and performance management (PM) data from [OpenNMS® Horizon™](https://www.opennms.org) and/or [OpenNMS® Meridian™](https://www.opennms.com/).