feat: Dark Mode support on blog website

[Abhinandankaushik]

Dark Mode support is currently missing on the blog website, which affects readability and user experience in low-light environments. This feature will allow users to toggle between light and dark themes based on their preference.

[Abhinandankaushik]

hey @Jefffrey
if this feature is seems to be required on this website
then please consider it and assign it to me so i will implement this feature

[Abhinandankaushik]

hey @Jefffrey
i have implemented this issue and also tested it in my local system
and it working correctly and i also make some extra changes in CSS file so that website appearance look good in dark mode and
i also raise a PR for that please review it when you get time and let me know if and further changes are required

[Abhinandankaushik]

hey @Jefffrey
i have fixed all issue which you described and created preview video for that
please check this : #148