add check for no requiring docstring if the overload decorator is pre…

[matiagimenez]

Fixes #13

Describe your changes

• Added functionality to check if a node requires a docstring by leveraging the _has_decorator method from the DocstringNode class. This ensures that nodes decorated with specific decorators, such as @overload, are correctly identified and excluded from the docstring_required check.

Checklist

• Test cases have been modified/added to cover any code changes.
• Docstrings have been modified/created for any code changes.
• All linting and formatting checks pass (see the contributing guidelines for more information).