Refactor Tic-Tac-Toe code and enhance documentation

[prem-2006]

Updated authorship information and improved documentation for the Tic-Tac-Toe game. Added input validation and refactored function declarations for better readability.

Description of Change

References

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added tests and example, test must pass
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes: