Add support to `set(Map)` on func DSL (experimental)

[mcruzdev]

Problem

Currently the following code does not work as expected:

  @Test
  void set_with_map() {
    Workflow workflow =
        FuncWorkflowBuilder.workflow().tasks(set(Map.of("message", "hello world!"))).build();

    WorkflowApplication app = WorkflowApplication.builder().build();

    WorkflowDefinition workflowDefinition = app.workflowDefinition(workflow);

    WorkflowModel model = workflowDefinition.instance(Map.of()).start().join();

    Optional<String> text = model.asText(); // return "{ }"
  }

The workflow's output returns an empty object ever (not expected).

Using a JQ approach like:

      return WorkflowBuilder.workflow("hello")
                .tasks(t -> t.set("sayHelloWorld", "{ message: \"hello world!\" }"))
                .build();

The result of the worklfow is: { "message": "hello world" } .

I would be great if we have the same behavior with set(Map.of("message", "hello world!") approach.