Add Error404 module and modify App.jsx

[Swapnadip2005]

Description

This pull request adds a new Error404 module and modifies the App.jsx and index.html files.

• The Error404 module includes its JSX file, CSS module, and assets to improve error handling and user experience.
• Updates to App.jsx ensure integration of the Error404 module.
• Modifications to index.html enhance the application's structure and meta content.

Motivation:
These changes aim to improve the application's error handling by providing a dedicated Error404 page, ensuring users are guided effectively when encountering broken links or missing pages.

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Type of Change

• 🆕 New Feature
• 🐛 Bug Fix
• 🖼 Wallpaper Added
• 🎨 UI/Design Update
• 🔄 Refactor/Code Improvement
• 📂 Other (Specify here):

Issue Linked:
Fixes #20

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Checklist

• 📖 I have read and followed the Contributing Guidelines.
• ✅ My code adheres to the project's style guidelines.
• 🧪 I have tested my changes locally and ensured no existing functionality is broken.

Video

WallGodds.-.Google.Chrome.2025-01-27.21-50-46.mp4

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Additional Notes

The Error404 module is a new addition and may require future adjustments as the application evolves.

[github-actions]

🎉 Thanks @Swapnadip2005 for your PR! A maintainer will review it shortly. We appreciate your contribution!

[Parnab03]

Thank you for your contribution, @Swapnadip2005.

However, your PR does not align with our guidelines, specifically #25. Additionally, it doesn't follow the instructions we discussed on Discord.

Guidelines: #25
Discord Message: https://discord.com/channels/1319563461423792179/1332244683241558036/1333439753307160608

For that we are not accepting your PR.

[Swapnadip2005]

I have checked the guidelines and attached the Video submission as mentioned. You can check once please @Parnab03. Thank You !!

[Parnab03]

I have checked the guidelines and attached the Video submission as mentioned. You can check once please @Parnab03. Thank You !!

However, it doesn’t meet guidelines #25 and misses the following:

• "Page Not Found" tag at the bottom right.
• Window size is larger than specified in the Figma file.

You are advised to discuss the issue on Discord before raising incomplete issues.