update interface of the home screen

[ThreeWater1037]

👉 Checklist

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• I have reviewed my submission thoroughly.
• I have tested my code (if submission is related to coding) and run the game before pushing (to make sure the project compile).
• I have run the JUnit tests (if submission is related to coding).
• I have read the Code of Conduct and Contribution Guidelines.

✍ Description of the Pull Request

Please concisely describe the changes you have made.

• Hello, I have made some preliminary modifications to the main menu style.
  I replaced the "Start Game" and "Quit Game" buttons with rounded buttons and adjusted their colors to better match the theme.
  Additionally, I added a background image—the one featuring the cosmos—and set it to scroll horizontally.

🔗 Issue link

Issue reference number and link goes here e.g. 'Fixes/Closes #77 '.

• This Pull Request fixes the issue : 'Closes [Feature]: Update interface of the home screen #77 '
• This Pull Request does not fix an issue.

Thanks for taking the time to fill out this Pull Request! ❤️ Thanks for contributing to this project 🦖

[github-actions]

👋 Hello @ThreeWater1037, thank you for submitting in Dinosaur Exploder 🦖 PR! To allow your work to be integrated as seamlessly as possible, we advise you to:

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[jvondermarck]

Thank you so much for your contribution !! Sorry for the delay !

[jvondermarck]

Can you just resolve the conflict please ? @ThreeWater1037