TASK: Implement `copy()` method to the `Person` class

[TheGittyPerson]

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Difficulty: Lower Intermediate to Intermediate

TODO:

• Add a copy() method to the Person class in person.py.
• The method should have a deep parameter of type bool that defaults to True. This determines whether all other mutable instance attributes should also be copied.
• Remember to add type hints and docstrings where necessary and follow PEP 8

PR steps:

1. Fork this repo
2. Clone the forked repo
3. Create a new branch and name it feature/copy-method
4. Push commits to your remote fork
5. Create a PR titled TASK: Implement `copy()` method to the `Person` class (#143)
6. At the end of the PR description, add Closes #143
7. Submit the PR (Ensure you allow maintainers to edit)

Please make sure you have read the Contributing Guidelines before working.

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