🚀 [New Feature_LP] - Dark theme #158

Description of the enhancement. ✍🏻

As we see all website built in two theme dark theme and light theme so that i would like to add dark theme feature in this website.

Describe briefly how you would implement this enhancement.

Some steps to implement this enhancement-
1. first add the icon at the right top corner.
2. write style code for dark theme.
3. build logic to toggle theme.

Screenshots Example (if applicable)

No response

Additional information

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