Re-design Proposal for beautifier.io

[sherifsallam]

Hello!

As an appreciative user of beautifier.io during my projects, I love this tool and find myself using it and its many options. I would love for it to have a more organised and simplistic design. I feel like making it look more modern and sleek would make a huge difference in the user's experience.

I saw that implementing a CSS library raises the concern of backward compatibility, as mentioned by @bitwiseman in the Dark Mode issue.

I would like to propose, for starters, small re-formatting and alignment changes using CSS, and not a library. After that, I'd love to add a dark mode feature, being triggered on and off with a simple button on the website, if it is not being worked on yet.

Please let me know if I should provide a clearer framework for what I think the website should look like if this is of interest to you.

Thanks!

[bitwiseman]

@sherifsallam
I think the dark mode PR #2058 is okay and I've gone ahead and merged it. However, if you would like to make further improvements, they would be totally welcomed.