Title: Add Dark and Light mode theme option.

[kou95shik]

Is your feature request related to a problem? Please describe.

It will help for user in night.

Describe the solution you'd like.

I will add the feature in nav bar that can switch dark mode to light mode and vice versa.

Describe alternatives you've considered.

Add Dark and Light mode theme option.

Add any other context or screenshots about the feature request here.

No response

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