Added Othello Game

[AsmitaMishra24]

🛠️ Fixes Issue (Number)

Example: Closes #1799

👨‍💻 Changes proposed and Brief Description

Added a fully functional Othello (Reversi) game. The game includes the following features:

1. Board Setup: Initializes an 8x8 game board with the initial four pieces placed in the center.
2. Piece Placement: Allows players to place pieces on the board according to Othello rules.
3. Legal Move Highlighting: Highlights squares where the current player can legally place a piece.
4. Piece Flipping: Flips opponent's pieces in all directions as per the game rules when a piece is placed.
5. Turn Switching: Alternates turns between the white and black players, with indicators for the active player.
6. Score Tracking: Displays and updates the score for both players in real time.
7. End Game Detection: Detects when the game ends and displays a message indicating the winner or if the game is a draw.
8. No Legal Move Handling: Handles cases where a player has no legal moves and passes the turn to the opponent.

✅ Check List (Check all the applicable boxes)

• [X] My code doesn't break any part of the project
• [X] This PR does not contain plagiarized content.
• [X] My Addition/Changes works properly and matches the overall repo pattern.
• [X] The title of my pull request is a short description of the requested changes.

📷 Screenshots

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[AsmitaMishra24]

@swapnilsparsh, please review the pr

[AsmitaMishra24]

@swapnilsparsh, please review the pr