feat: remove global.css import to enable global CSS file customizations (#650)

Co-authored-by: Marco Pasqualetti <24919330+marcalexiei@users.noreply.github.com>

examples/tuono-tutorial/src/routes/__layout.tsx

@@ -1,6 +1,8 @@
 import type { ReactNode, JSX } from 'react'
 import { TuonoScripts } from 'tuono'
 
+import '../styles/global.css'
+
 interface RootLayoutProps {
   children: ReactNode
 }