Add dark mode

[nidhi752]

Hi, I observed that the website currently does not have a dark mode, which can be a valuable feature for enhancing user experience. Dark mode helps in reducing eye strain, especially in low-light environments or during nighttime browsing. It also contributes to better visibility and overall comfort for users who prefer a darker interface. I would like to implement this feature to ensure that the website is more accessible and user-friendly, catering to different preferences and improving the overall usability.
Please assign this issue to me under hackoctoberfest'24

[narayan123git]

I would like to work on adding dark mode for this project. Please assign this issue to me. I'll ensure to follow any guidelines provided and submit the changes promptly. Looking forward to contributing.

[hsbt]

Feel free to contribute that without our assignment.