issue 88 - Pause option added

[AayushiJapsare15]

What does this PR do?

Pause button is added which pauses the game when clicked and resumes when clicked again.

Fixes #88

Type of change

• Chore (refactoring code, technical debt, workflow improvements)
• New feature (non-breaking change which adds functionality)

How should this be tested?

• Try pause button while playing.

Mandatory Tasks

• Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

@YadavAkhileshh, could you kindly add the hacktoberfest-accepted and appropriate level labels to my PR? Thank you!

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our chaotic CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

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[github-actions]

🎉🎉 Thank you for your contribution! Your PR #513 has been merged! 🎉🎉