Provide a typesafe way for adding configurations

[polyzos]

When creating a PulsarClient, Producer, Consumer and Readers it will be good to have a way to provide all the necessary configurations in a typesafe way.
For example at the moment when creating a PulsarClient, we can provide the serviceURL:

JPulsarClient.builder().serviceUrl(s"pulsar://$host:$port")

but we need to support adding more configurations, like security etc.
We need to think whats the best way to implement this