Issue: website does't have a 404 page

[sarthaksharma27]

Issue Description:
The website currently lacks a custom 404 error page, which results in a less user-friendly experience when users access non-existent routes. When navigating to URLs like https://main-website-linkcollect-xi.vercel.app/random or /abc,

Screenshot:

Possible solution:
Implementing a custom 404 page will not only improve user satisfaction but also help in retaining users who might otherwise leave the site due to encountering dead-end pages.

[sushilpandeyy]

I am working on this issue please assign it to me @sarthaksharma27