Leverage Quarkus code generation for Salesforce DTO generation

It'd be good if we could leverage the code generation features of the `quarkus-maven-plugin` to do the generation of the Salesforce DTOs.

Currently this is handled by the `camel-salesforce-maven-plugin`. If we could make the core logic available is some artifact that our extension would depend on, then we should be able to add hooks for the `generate-code` mojo.