Operator & OLM (Operator Lifecycle Manager) Install

[david-martin]

https://issues.redhat.com/browse/CONNLINK-667

related #573

Make the mcp-gateway installable via OLM.
To do this, we'll need an operator bundle.
We already have a kubernetes controller.
Let's migrate that into a golang operator.

Tasks

• Document what we want the behaviour to be when an MCPGatewayExtension is created
• Convert mcp-controller to a Kubebuilder-style Go operator project
• Ensure MCPServer and MCPVirtualServer CRDs are generated and bundled
• Add RBAC markers and generate manifests
• Build and push operator image (to Quay?)
• Generate and push OLM bundle and catalog images (bundle, index)
• Add GitHub Action to automate build, bundle, and release to Quay on tag
• Verify install via OLM (CatalogSource + Subscription) on OpenShift/K8s

[esnible]

@david-martin Can you provide a description of this Issue?