Add: Error Page

[AaadityaG]

Pull Request

Related Issues: Added 404 page

Fixes #335

Description: [Provide a brief description of your changes.]

Checklist:

• [x] I have tested my changes.
• [x] My code follows the project's coding standards.
• [ ] I have updated the documentation (if applicable).

Screenshots:

Please add KWOC tag!

[vercel[bot]]

Someone is attempting to deploy a commit to a Personal Account owned by @ani1609 on Vercel.

@ani1609 first needs to authorize it.

[ani1609]

@AaadityaG the PR contains ESLint errors, please debug the issues and commit your changes.

[vercel[bot]]

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