Add Claude plugin to help test operators from art-images-share repository

[sherine-k]

What this PR does / why we need it:

This PR introduces a new plugin fbc-art-images and its commands (catalog-source, idms and setup).

Which issue(s) this PR fixes:

In the Brew / ErrataTool world, ART periodically released pre-GA builds to pre-release indexes like 'registry.redhat.io/redhat/redhat-operator-index:v4.19-prerelease-aws-efs-csi-driver-operator'.
In Konflux, with FBCs, it is now possible to directly consume the operators from quay.io/redhat-user-workloads/ocp-art-tenant/art-fbc (a public repository): eg. quay.io/redhat-user-workloads/ocp-art-tenant/art-fbc:ocp__4.20_aws-efs-csi-driver-operator

Even though this image is publicly available, it contains references to related images in registry.redhat.io which might not have been pushed yet.
These related images can be consumed from mirror quay.io/redhat-user-workloads/ocp-art-tenant/art-images-share by setting up an IDMS on the cluster.

This plugin helps the user to:

• create a CatalogSource for consuming the operator from the public repository quay.io/redhat-user-workloads/ocp-art-tenant/art-fbc
• discover all related images for that operator
• create an IDMS file for setting up mirrors for all images required
• give instructions to update the cluster's pull-secret

Special notes for your reviewer:

• From https://docs.google.com/document/d/1YpMZrKUHQG1QAVstVY4Z7RvM3jyZec6sMSCYoNOAaA8/edit?tab=t.0
• pull-secret.md is merely instructions, instead of a command. This way, credentials to the internal registry art-images-share are not manipulated by the agent.
• I'm not sure if this qualifies as its own plugin, or if there is a better "home" for these commands.
• Next step: create IDMS and catalogSource for a list of operators (creating a catalog containing multiple operators)

Checklist:

• Subject and description added to both, commit and PR.
• Relevant issues have been referenced.
• This change includes docs.

[sherine-k]

/unhold
/assign @stbenjam

[stbenjam]

I don't know much about FBC but looks good except for a couple of small things

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[sherine-k]

cc @ashwindasr

[enxebre]

Is my understanding correct that the setup command exercises the same logic implemented by catalog-source and imds commands? if so, can DRY this by making that logic skills that then all three commands leverage.

[sherine-k]

I didn't know about skills. Love the suggestion!

[enxebre]

This was resolved, but I commented #63 (comment)

[enxebre]

dropped some feedback, this looks great to me otherwise

[stbenjam]

Closing/reopening to retrigger prow.

[stbenjam]

/test images

[sherine-k]

/test images

[openshift-ci]

@sherine-k: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/test images

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