Adding a custom 404 page

[Aman-G-upta]

Currently, the website does not have a custom 404 error page. When users navigate to a non-existent URL, they are either presented with a default server error page or a blank page. A custom 404 page would improve the user experience by guiding users back to relevant parts of the site instead of leaving them with an error.

Design a 404 page with the following elements:
A friendly message to inform the user that the page is not found.
A link back to the homepage or main sections of the website.

Please assign me under this issue @aditya-bhaumik

[veepanshu-kasana]

@aditya-bhaumik I want to contribute to this project on this particular issue. Please assign it to me!

[Apoorva57]

@Aman-G-upta sure go ahead

• Make sure to join the discord server for further communication
• Don't forget to star the repository
• Complete the task in next 2 days and kindly mention your issue # in your pr like:
  Closes #IssueNumber

Note: the level of the issue may change based on the quality of the PR code