fix: Aligned to center the save modal form in the gpa project

[Ayontikapal]

📝 Pull Request Description

Related Issue

Closes #7132

Summary

This PR aligns the Save Modal form in the GPA project to appear at the center of the page, bringing an UI change to make the project appear more modern and accessible

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New project addition
• 🚀 New feature or UI/UX enhancement
• ♻️ Code refactoring / clean-up
• 📝 Documentation update
• ⚙️ GitHub Workflow automation or DX improvements

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🛠️ Changes Made

• Centered the Save modal dialog to the center of the page
• Added position to the dialog element

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📷 Screenshots / Video Recording

Before

After

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🤝 Contributor Checklist

• My code follows the code style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation / README files accordingly.
• My changes generate no new warnings or console errors.
• There are no unrelated changes or formatter noise in this PR.

[vercel]

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A member of the Team first needs to authorize it.

[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 CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[Ayontikapal]

@dhairyagothi Please preview this pr under gssoc'26

[github-actions]

🎉 Your pull request has been successfully merged! 🎉 Thank you for your valuable contribution to our project. Your efforts are greatly appreciated. Feel free to reach out if you have any more contributions or if there's anything else we can assist you with. Keep up the fantastic work! 🚀