ErrorEntryTemplate should include detail field as well.

[coollog]

From https://github.com/GoogleCloudPlatform/minikube-build-tools-for-java/issues/113

The ErrorEntryTemplate currently has code and message. It should also have the details field of registry errors to give more details on a registry error back to the user.

So that the details can also be added to a RegistryErrorException.

To implement this, a custom deserializer for the detail field is needed since the detail field can have arbitrary JSON keys.

[zeeshan58]

Hi, is someone is working on this issue, as I like to work on this issue.

[chanseokoh]

Hi @zeeshan58, no one's working on this. We appreciate contributions.