Create the Sketch provider used to manage the StyleSheet.
This makes sure identical styles will never be computed twice.
Use it at root of your render function.

import redraw
import redraw/dom/client
import sketch/redraw as sketch_redraw

pub fn main() {
  let app = app()
  let root = client.create_root("root")
  client.render(root, {
    redraw.strict_mode([
      sketch_redraw.provider([
        app(),
      ]),
    ])
  })
}