[Minor Improvement] Add Dark Mode in Web UI

[Greatz08]

Working without dark mode can strain the eyes of those who, like myself, consistently use their laptops in dark mode for every possible thing. Dark mode is not only preferred but also easier on the eyes. Therefore, it would be greatly appreciated if an option to switch to dark mode could be added to the UI.
Thank you! :-))
(NOTE : I tested UI with dark reader extension and it doesnt work on the storm UI very well so requesting here else this extension was always the way for me and many others on web apps which doesnt support by default dark mode)

[jaigouk]

I also wanted to have "dark mode". I just modified it and created a separate folder. https://github.com/jaigouk/storm_wiki

• Dracula soft dark color
• Duckduckgo
• gpt-4o-mini
• dotenv for env vars
• save result files as '*.md'
• add date to to top of the result file
• added STORM_TIMEZONE

[shaoyijia]

Hi @jaigouk , this looks pretty cool! Do you want to contribute the "dark mode" feature to our repo? We welcome enhancements on the demo light and believe it can benefit more developments. You can check out our CONTRIBUTING.md if interested.

[jaigouk]

@shaoyijia thanks. I will work on it in the weekend!

[jaigouk]

cleaned up little bit and opened a new pr