Feature/target loading architecture

[denyost]

Implemented the TargetSource loading pipeline within the package discovery:

• discovery/core defines the loader interface and other necessary types
• discovery/loaders hold the implementations for the different loader types, which observe the changes from the target sources
• discovery/loader.go serves as the entrypoint, from which the corresponding loader gets called
• target_manager.go consumes discovered target snapshots and reconciles them into Kubernetes Target CRs.
• targetsource_controller.go orchestrates lifecycle management, wiring loaders and target managers together while keeping the reconcile loop focused on start/stop logic only.

[denyost]

Implemented the TargetSource loading pipeline:

• loaders.go defines a pluggable loader interface and registry; loaders observe external sources of truth and emit target snapshots via channels.
• target_manager.go consumes discovered target snapshots and reconciles them into Kubernetes Target CRs.
• targetsource_controller.go orchestrates lifecycle management, wiring loaders and target managers together while keeping the reconcile loop focused on start/stop logic only.

[cloudflare-workers-and-pages]

Deploying gnmic-operator with    Cloudflare Pages

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