Added Python Snake Game with Turtle Graphics

[Nandini-Sutrave]

This pull request introduces a simple yet engaging Snake Game implemented in Python using the turtle library. The game features a graphical user interface (GUI) and provides the following functionalities:

Gameplay: The player controls a snake that moves across the screen, consuming food to grow in size. The game ends when the snake collides with the screen boundary or itself.

Score Tracking: Displays the current score and updates it as the snake eats food.

High Score: Tracks and displays the highest score achieved during gameplay, allowing players to compete for a new high score each time they play.

User Interface: The game uses the turtle library to create a simple and interactive GUI, where players can use the arrow keys to navigate the snake.

Features:

• Interactive UI: Clear and responsive controls using the arrow keys.
• Live Score Updates: Real-time updates of the score displayed on the screen.
• High Score Tracking: Remembers and displays the highest score achieved.