Publish the Helm Chart in Github OCI registry

[yosuf]

Currently, one has to clone the repo in order to use the chart. The formal Helm way is to publish the the chart in the GitHub OCI registry.

Implementation idea:

• triggers: tags only
• pre-publish stage: lint and maybe later some other tests
• pre-package: change the chart version to the tag (with sed or alike) or maybe helm package/punlish supports defining the chart version.
• push to GitHub OCI under this project id.

[JanBenisek]

@yosuf Do you think we could publish it to OCI? That'd make installing easier.

[yosuf]

@JanBenisek sure.
If you really eases your workflow, I would love to see a PR.

I will write a bit on how I think it is best. But of course open for improvements.

[JanBenisek]

@yosuf I had an hour of time, so I drafted it here #30.
I won't have much time next week, so plenty of time to think about it and test it.