[Helm/Release] Manifest should be legibly rendered in diffs

[viveklak]

We currently provide resourceNames which contains grouping by resource types for resources installed by the chart.
It would be desirable to render the manifests and in particular, differences during diffs. Currently modeling the resources as plain json is rendered rather poorly and illegibly. Need to investigate a better UX for manifests.

[viveklak]

In addition any possible secret values should be cloaked. See https://github.com/hashicorp/terraform-provider-helm for instance.