Provide a Helm chart to manage NACK resources

[wpnpeiris]

Hi team.
As I proposed here, we would like to have a helm chart for managing NACK Jetstream resources (stream, consumers, kvs, etc). Currently, we manage many of these as separate YAML files. Having a simple chart greatly reduces boilerplate.

I have made a PR for such helm chart as a proposal #1063.
with this we can manage multiple resources as the following.

streams:
  - name: orders
    subjects: ["orders.*"]
    storage: file
    replicas: 1
    maxAge: 72h
  - name: shipmets
    subjects: ["shipmets.*"]
    storage: file
    replicas: 1
    maxAge: 72h
  
consumers:
  - streamName: orders
    durableName: orders-worker
    ackPolicy: explicit
    deliverPolicy: all
    ackWait: 30s

keyValues:
  - bucket: app-kv
    history: 3
    ttl: 24h
    storage: file
    replicas: 1

objectStores:
  - bucket: assets
    ttl: 168h
    storage: file
    replicas: 1

Let us know if it is a good approach?