TASK: Add helpful string representations

[TheGittyPerson]

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Difficulty: Lower Intermediate

TODO:

• Add __str__() to Person
• Add __repr__() to Person
• Add __str__() and __repr__() to the dataclasses in person.py
• You can optionally do this for the other classes in the other files as a bonus.
• 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 CATEGORY/improve-str-repr
4. Push commits to your remote fork
5. Create a PR titled TASK: Add helpful string representations (#140)
6. At the end of the PR description, add Closes #140
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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