feat: non-linear behavior to step component

[wermeson-lopes-brisa]

Description

Add the global non-linear step option, where steps can be completed in any order. In this mode, when moving to another step, the previous one is not automatically checked as completed, requiring the developer to say so individually.

Expected Behavior

It is expected that there will also be the option of non-linear behavior for the step component.

Current Behavior

Currently, steps are treated only with linear behavior, where they are marked as resolved as they are advanced.

Additional Information

This improvement/adjustment is part of a package of improvements planned together. For full documentation, access the file here:
Novas Sugestões para Stepper do Ion.pdf.

Concluding

• Add non-linear option
• Add a helper method that informs whether all steps are checked or not.
• Make sure linear option is the default option.