Merge pull request #325 from TERNION-1121/othello_contribution

Add Othello/Reversi GUI Game

Author: Mrinank-Bhowmick

projects/Othello/Gotham-Font/GothamLight.ttf

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+<h1 align="center">⚫ Othello/Reversi ⚪ </h1>
+
+A GUI-equipped, [Othello/Reversi](https://www.worldothello.org/about/about-othello/othello-rules/official-rules/english) game made in **Python3** using the `pygame` library. Featuring two-player as well as Play with Computer modes.
+
+## 📜 Description
+Othello is a board-game played on a 8x8 board, with 64 discs that are black on one side and white on the other. Each player gets 32 such discs, out of which 2 from each player are kept on the board in the following manner:
+
+![image](https://github.com/TERNION-1121/Othello-Reversi-Game/assets/97667653/ea03fdd8-9abc-4b14-bdc9-7d983fb38041)
+
+<br>
+
+A move consists of "outflanking" your opponent's disc(s), then flipping the "outflanked" disc(s) to your color.
+To outflank means, if your disc is kept on square X, and you have another disc on square Y, such that:
+- X and Y lie on the same row, or
+- X and Y lie on the same column, or
+- X and Y lie on the same diagonal,
+
+If any one (or more) of the above is the case while playing, then the Opponent's discs between X and Y get flipped to your color.
+
+<br>
+
+Example:
+
+> Here White disc A was already present on the board, after placing White disc B, the row of Black discs between White disc A and B got outflanked,
+
+![06a8330dc692b7631a2e50660e4a7346](https://github.com/TERNION-1121/Othello-Reversi-Game/assets/97667653/84feed70-ee16-4f4f-baad-39a3ecc148ed)
+
+> And thus the outflanked Black discs flipped to White.
+
+![cd51ed676fb49538035a8bf006ffbe96](https://github.com/TERNION-1121/Othello-Reversi-Game/assets/97667653/bafe9059-7a32-4d93-aaa2-bfc97a311fce)
+
+For a more comprehensive explanation of the game rules, check out this [link](https://www.worldothello.org/about/about-othello/othello-rules/official-rules/english).
+
+<br>
+
+### 🎯 Game Modes
+
+#### ⚔ Two-Player Mode 
+Two players can play the game, alternating their turns.
+
+#### 🤖 Play with Computer
+Play with the computer! It makes use of the minimax algorithm with alpha-beta pruning. 
+
+Currently the algorithm makes use of the following heuristics for a position's evaluation:
+- Coin parity
+- Mobility
+- Corner Values
+
+### How to Play the Game 🎮
+1. Download the source code. (Either clone the repository or download the whole code from GitHub)
+2. Make sure to install Python3 on your Computer along with `pip`. (Python3.10+ is required)
+3. Open your terminal, navigate to `~/PYTHON-BEGINNER-PROJECTS/projects/Othello` and type the command:
+   ```
+   pip install -r requirements
+   ```
+5. Navigate to the `src` directory, run the `main.py` file and play the game!
+> P.S. You can change color modes using the 'L' key!