Added a feature to store and display highscore

[Roshr2211]

PR Description 📜

A feature to store and display highscore which gets updated once a highscore is reached
Fixes #3362

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Mark the task you have completed ✅

• I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
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Thank you soo much for contributing to our repository 💗

[kunjgit]

Thank you @Roshr2211 ,for creating the PR and contributing to our GameZone 💗
Review team will review the PR and will reach out to you soon! 😇
Make sure that you have marked all the tasks that you are done with ✅.
Thank you for your patience! 😀

[kunjgit]

LGTM!

[kunjgit]

Thank you @Roshr2211 , for your valuable time and contribution in our GameZone 💗.
It’s our GameZone, so Let’s build this GameZone altogether !!🤝
Hoping to see you soon with another PR again 😇
Wishing you all the best for your journey into Open Source🚀