Dark mode need to apply Whole website

[govindbairi]

As we prioritize user comfort and accessibility, implementing a full-site dark mode is essential. Dark mode not only reduces eye strain in low-light environments but also extends battery life on devices with OLED screens. By applying dark mode to the entire website, we create a cohesive and immersive browsing experience that caters to users' preferences.

[Divyansh8843]

@govindbairi I want to contribute in this issue. please assign this issue to me