kctrl dev reconciler does not report an Error back

[jorgemoralespou]

What steps did you take:
We're using this code as library in our project (educates)[https://github.com/vmware-tanzu-labs/educates-training-platform] for deploying the platform as an Application reusing the capabilities of the dev command, as we only need to deploy our bits in the cluster but we don't need further reconciliation.

What happened:
When using this code as library , appReconciler.Reconcile ignores reconcile.Result as it's not giving any valuable information about the reconciliation status or errors if they happened at any of the internal phases (fetch, template, deploy).

What did you expect:
We expected that appReconciler.Reconcile would return a meaningful reconcile.Result with internal information of the reconciliation status, so that we could know if it failed or was successful and if it failed, on which phase (fetch, template, deploy) failed, and potentially the reason of failure. Currently there's only possible by looking at the logs printed on output.
As the real implementation of appReconciler is supposed to run in the cluster, this information is somehow added to the App status that lives in the cluster, but for dev mode where there's no App living in the cluster it'll be ideal to have this information reported back somehow to the consumer/client.

Anything else you would like to add:
Some conversation about this on Kubernetes slack

Environment:

• kapp Controller version (execute kubectl get deployment -n kapp-controller kapp-controller -o yaml and the annotation is kbld.k14s.io/images): v0.50.0
• Kubernetes version (use kubectl version): Irrelevant

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