Add a pop up dialog box for subscribing to newsletter done ! #541 ✨✨

[Subhajit-2023-44]

Hello, PR
Add new feature - #541
Add a pop up dialog box for subscribing to newsletter done properly -

📄 Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (adds or updates related documentation)

✅ Checklist

• I am a participant of GSSoC-ext.
• I have followed the contribution guidelines of this project.
• I have made this change from my own.
• I have taken help from some online resources.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have added documentation to explain my changes.

Mandatory Tasks

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

🤝 GSSoC Participation

• This PR is submitted under the GSSoC program.
• I have taken prior approval for this feature/fix.

[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 #546 has been merged! 🎉🎉