chore(charts): add readme and a script to sync changes

deploy/charts/README.md

@@ -0,0 +1,3 @@
+# Sync changes to emqx-enterprise
+
+When making changes in charts, please update `emqx` charts and run `./sync-enterprise.sh`.

deploy/charts/sync-enterprise.sh

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+sed 's|emqx/emqx|emqx/emqx-enterprise|' < emqx/values.yaml > emqx-enterprise/values.yaml
+cp emqx/templates/* emqx-enterprise/templates