Added Pokemon Game Project [GSSOC'23]

[killerraj369]

Title and Issue number

Close #5167

Checklist:

• [X] I have mentioned the issue number in my Pull Request.
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have created a helpful and easy to understand README.md

[killerraj369]

@pranjay-poddar I would request you to review and merge my PR as early as possible as GSSOC's is about to end. Thank You !!