[Feature Request]: AddXml Specific Attributes Order

### What would you like to happen?

As a Hop user working with **AddXml** transform
I need to set and define the attributes order instead of having a default one (ASC sort based on attributes names)
in order to cover more use-cases and have more flexibility generating data structures to adhere to business rules.

### Issue Priority

Priority: 3

### Issue Component

Component: Transforms

Start by locating the AddXml transform implementation and its existing tests, then trace where attributes receive their default ascending-name order. Done means users can define a specific attribute order when generating XML data structures, with the behavior covered by tests.

Written by the indexing model from the issue text.