Introduce a Annotaton based API to impl Imixs-Workflow

[rsoika]

See this article and the idea how to use annotations:

https://dzone.com/articles/ultra-fast-microservices-part-2-when-microstream-m

public class MyBusinessCase {
    private final long id;
    private final String name;
    private final String description;
    private final int rating;

    @WorkflowInstance
    public Product(
            @WorkitemProperty("id") final long id,
            @WorkitemProperty("name") final String name,
            @WorkitemProperty("description") final String description,
            @WorkitemProperty("rating") final int rating){
            //...
            }

}

...and instantiating the engine

@WorkflowGroup("Invoice")
public class MyWorkflow {
    
    public void create(final Product product) {
       ..
    }