Function useTheme

useTheme(): {
setTheme: (theme: "dark" | "light") => void;
theme: "dark" | "light";
}
Hook to get and set the current theme (color scheme).

Returns { setTheme: (theme: "dark" | "light") => void; theme: "dark" | "light" }
- setTheme: (theme: "dark" | "light") => void
  Function to set the current theme (color scheme)
- theme: "dark" | "light"
  Current theme (color scheme)