Add dark mode support to exe.dev front page

Author: skybrian2 Channel: #feedback Link: https://discord.com/channels/1405685085923049482/1405686161791516873/1465177348386328636

Description

Dark mode for the exe.dev front page would be nice.

Context

There was a follow-up response indicating that the team thought dark mode settings were being respected by default, suggesting this may be a bug rather than just a feature request. The responder mentioned they would investigate and fix this issue.