Configuration reference documentation of SerdeConfiguration does not look good

[sdelamo]

Issue description

It could be easily improved if we used an interface backed by a @ConfigurationProperties class with setters and and getters. The setter javadoc would be used.

Currently, we are using just an interface annotated with @ConfigurationProperties.

[sdelamo]

@graemerocher if you are ok with the change I can submit a PR.

[graemerocher]

I think this needs a PR to the documentation generation on to the code which is fine as an interface