Add a helm chart

[david972]

Is your feature request related to a problem? Please describe.
It would be great to have a helm chart to deploy pgcat into kubernetes
Is it planned to create it ?

Describe the solution you'd like
N/A

Describe alternatives you've considered
A deploy folder within this repository would be suffice

Additional context
N/A

[levkk]

We don't use Kubernetes anymore, but I'm happy to accept a PR with a Helm chart.

[david972]

I'll do the PR

We don't use Kubernetes anymore
what do you use ?

[yasn77]

@levkk It would be great if @david972 PR could get merged.

Thanks