Update Snake.java($Add Help Button for Game Instructions)

[mpamposd]

Add Help Button for Game Instructions

Description

This pull request adds a "Help" button to the game, allowing users to view instructions on how to play and understand the game.

Changes Made

• Added a JButton labeled "Help" to the Snake class.
• Created a showHelpDialog method to display game instructions in a JOptionPane.

How to Test

1. Run the Snake game.
2. Click the "Help" button at the bottom of the window.
3. Verify that a dialog appears with instructions.