Implement theme toggling throughout the webiste

[ShivanshPlays]

https://github.com/user-attachments/assets/e03df031-0c86-47a3-a6c6-08186d56ac0f

Also note that there are several inconsistencies in the website, like the dropdown of blog has boilerplate code and whosoever implemented it did not remove the default shadCN code...

[anuj123upadhyay]

Okk i assign this issue to you