feat: add helm chart

[david972]

issue #615

[david972]

The chart working well

There is couple of thing that need to do

• I did not find the docker image tag with semver
• need to add some pre-check for the config

[levkk]

I have no way to validate that this is correct, but I'm happy to merge it to give it a try. Thanks for the contribution!

[alexelent-carta]

what would the helm repo add command be to use this chart?

Is it possible this never worked due to https://github.com/postgresml/pgcat/actions/runs/8008557639/job/21875234561?

[code-sauce]

@david972 @alexelent-carta do we now know how to add this repo to helm?

what's the exact command? Locally, it complains the repository doesn't have index.yaml

[david972]

hi
for now we'll need to do it locally as the publishing failed
The log is available anymore i cannot investigate
I'll do it later