Add a newgame StackUp Game

[Github-RiyaGupta]

This PR resolves #3128
Adding StackUp game

PR Description 📜

The game "StackUp" is to stack the blocks on top of each other in such a way that you reach to the pinnacle by getting one on the top of another and secure a win.

Fixes #3128

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kindly mark this contribution under GSSoC'24.

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[kunjgit]

Thank you @Github-RiyaGupta ,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]

Thank you @Github-RiyaGupta , 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🚀