TASK: Implement `Person` serialization to a dictionary

[TheGittyPerson]

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Difficulty: Upper Intermediate to Advanced

TODO:

• Add a method to convert a Person into a dict, with all the instance variables stored inside it. Call the method whatever you want (e.g., serialize(), to_dict(), dictify())
• Bonus: Add a classmethod to deserialize a dictionary into a Person object.
  • The name of the method should make it clear that the method is the opposite of the one above (deserialize(), from_dict(), undictify())
  • Handling edge cases is important here
• Another bonus: Add serialization/deserialization methods in the other classes too, so that the final serialization in of a Person is pure built-in types. This might take some time.
• 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 feat/person-dict-serialization
4. Push commits to your remote fork
5. Create a PR titled TASK: Implement `Person` serialization to a dictionary (#141)
6. At the end of the PR description, add Closes #141
7. Submit the PR (Ensure you allow maintainers to edit)

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