How can I ship a Helm application as a Replicated appliance?

If I have an existing Helm application, what’s the easiest way to get this created as a Replicated YAML file that will be accepted in and packaged as a Replicated application?

In the last year or so, Replicated has added signifiant support for packaging your application as a Helm Chart: HelmChart | Replicated Docs

More details on how Helm charts can be processed here:
Options for KOTS processing Helm Charts

Brief overview of the feature here: Packaging Helm charts as KOTS apps - Replicated