[feat]: add theme toggle button like on vercel website

[Mansi1]

Feature description

Affected component/components

No response

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[ndubosq]

Hi, this feature already exists : See If you want the same "exact" button as vercel, just make it yourself, that's the goal of shadcn/ui 🙂

[imMatheus]

I am actually building a Vercel-themed Shadcn clone on the side (just for fun and learning). I have made that exact component So if you want it, feel free to copy-paste it here 🌟 https://vercel-ui-phi.vercel.app/docs/components/theme-switcher