feat: Dark Mode for Grind 75

[yehiarasheed]

Description

I was taking a look at the Grind 75 webpage at night and the white theme looks awfully bright, I suggest that we add Dark Mode to this section of the website as well for the convenience of the users, especially that all users are programmers and all of the products that we use daily support Dark Mode. I can address this issue in a PR as needed.

Screenshots

[hanuchaudhary]

I can work on this!

[dishafaujdar]

@hanuchaudhary are you still working on this?

[yehiarasheed]

Hi @breeworks and @hanuchaudhary, I’m happy to work on this, but @yangshun hasn’t commented on the issue, and no one else has committed to the repo since my last commit.

[dishafaujdar]

@yehiarasheed gotcha.

@yehiarasheed I think instead of relying only on a button for theme switching (which is an old pattern), we can implement a time-based theme where the background changes automatically—light or white in the morning, and dark or black in the evening or night. It can also include a manual option like a button, so users can switch themes themselves if they prefer. This approach offers both automation and user control for a better experience.