Factorial Recursive

Describe your change:

• Add an algorithm
• Fix a bug or typo in an existing algorithm
• Add or change doctests
• Documentation change

This pull request adds a new recursive algorithm implementation in Python. The implementation includes a short doctest and type hints so it passes automated checks. It is intended as a learning resource for beginners.

Checklist:

• I have read https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file.
• All new Python files are placed inside an existing directory (e.g., maths/).
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.

Example: Added factorial_recursive.py in the maths/ directory.
Reference: https://en.wikipedia.org/wiki/Recursion_(computer_science)