Extend kn-workflow CLI to Generate K8s secrets for workflows

[ElaiShalevRH]

The current functionality of the kn-workflow CLI allows for the generation of Kubernetes resources, specifically SonataFlow CRs and a series of ConfigMap CRs, based on the application.properties file, schemas and spec folders. However, a common use case has emerged where users need to patch the generated SonataFlow CR to mount a secret into the pod, making environment variables available to the workflow's application.

To streamline this process, we propose extending the kn-workflow plugin with the ability to Generate Kubernetes Secret from secret.properties files, while ensuring proper resource ordering. We will also update the plugin documentation and will provide examples.

[ElaiShalevRH]

Hey @ricardozanini, would like to get your blessing for this :) Thanks

[ricardozanini]

+1

@treblereel, can you please also evaluate this one for the upcoming improvements in EPIC?