[feat] support images used by Operators

[Pionerd]

Some operators (e.g. CNPG to create Postgres databases) do not specify the images used by their CustomResources (e.g. Cluster in the case of CNPG). In the case of CNPG, the image can be configured in the Cluster CR, but that is not required (see https://cloudnative-pg.io/documentation/1.22/quickstart/#part-3-deploy-a-postgresql-cluster).

I'd love either:

• the option to specify in helmper.yaml a list of additional images that should be pulled/processed by helmper manually
• or documentation on adding 'dummy' values to your values.yaml that include the missing images, probably something like the below should work (didn't test this yet):

values.yaml

helmperAdditionalImages:
  postgres16
    image: ghcr.io/cloudnative-pg/postgresql:17
  postgres17
    image: ghcr.io/cloudnative-pg/postgresql:17

[ChristofferNissen]

Hello @Pionerd, Thanks for the suggestion, will look into adding this very soon :+1:

[ChristofferNissen]

Hello 👋

This has been implemented as part of v1.5.0