404 pages redesign in p5js.org and beta.p5js.org

Increasing Access

here's the 404 page of https://beta.p5js.org/whatever

and here's the 404 page of https://p5js.org/whatever

I was thinking if we could redesign the 404 page similar to this, following the existing theme and typography of p5js.org website. So in future whenever a user mistakenly goes to any 404 page he/she will neither feel lost nor he/she has to press the back button to get back to the references or any other section.

Most appropriate sub-area of p5.js?

Other (specify if possible)

Feature request details

I am willing to take this enhancement and implement this.

It's just a matter of approval from maintainers and what they think about this enhancement if it's either needed or not, I am opening this to have a discussion with the maintainers before starting to work on this.

@ksen0