[🚀 Feature]: UI Dark Mode

[O5ten]

Feature and motivation

Request:
I want dark mode on the selenium grid and i think the selenium grid should follow system preferences on that.

Reason:
I embed the grid session in my grafana dashboard that shows other selenium metrics such as browser consumption, queue and limit and it looks really wonky when grafana is in dark mode. Light mode in grafana just looks plain awful so i'd prefer if i don't have to set it to that. :D

Usage example

In light mode

In dark mode where i'd like selenium grid to follow the system preference.

[github-actions]

@O5ten, thank you for creating this issue. We will troubleshoot it as soon as we can.

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Thank you!

[VietND96]

I have thought about this some time before, UI follows system preferences, but didn't add it yet. Will try to add it.

[O5ten]

I'm available to test it out early if you need help on that. 👍

[VietND96]

@O5ten can you preview the UI in PR details?

[O5ten]

100% I'll give it a go during the evening.

[O5ten]

Looks great!