Is your feature request related to a problem? Please describe.
Like some developers, I also feel like "dark mode" rules and light mode hurts...

Describe the solution you'd like
Tabler offers great features like switching themes. Why wouldn't we integrate this one to the Starlette Admin?

Additional context
I found this article on medium. I opened Starlette Admin Demo and checked out the console, tried to switch theme. It was easy but It doesn't work on some of the fields.