Allow extension to support AWS Neptune

[krezchikov42]

Hello there!

I would like to use quarkus to be able to connect to AWS Neptune. I did not see that as one of the services that this extension supports. Would it be possible to get this extension to support AWS Neptune? In the ReadMe it says They also provide a common infrastructure to make it easy to add new ones. However, I did not see any additional documentation about this route. What would the steps that need to be taken to have it support a new AWS service?

[scrocquesel]

Easy but not automated for now. It is basically lot of copy/paste/replace.

You can review this PR #1476 for an overview of what should be added. As Neptune is only supported with the pro image of localstack, no need for now to add a devservice module nor an integration test. So just the extension module with deployment/runtime and the documentation.