Add support for input parameter array initialization

[boma96]

Now it is possible to specify array as input parameter

builder.AddTask(
                wf => wf.ArrayTask,
                wf =>
                    new()
                    {
                        Integers = new[] { 1, 2, 3 },
                        Models = new[]
                        {
                            new ArrayTaskInput.TestModel { String = "Test1" },
                            new ArrayTaskInput.TestModel { String = "Test2" }
                        },
                        Objects = new dynamic[] { new { AnonymousObjProp = "Prop" }, new { Test = "Prop" } }
                    }
            );

[ognjenkatic]

One note regarding type conversions

[ognjenkatic]

This seems to return [ 1,2,3] as ["1", "2", "3"]. The reason is

 if (expression is ConstantExpression cex)
                return Convert.ToString(cex.Value);

@boma96
We can extract the correct type, but this might break something somewhere. However, most frameworks seem to be equipped to handle string to int conversion automatically if it is really convertible. I think we should do this, what do you think?

[ognjenkatic]

It will also break our tests

[boma96]

Thank you for pointing this out, did not notice it

[boma96]

Ok, will make separate PR for this