Revert "Remove all scribble bird stuff"

This reverts commit 538f222ee9895a225538ce8d5eabe67546ec6389.

public-apps/sd_controlnet.livemd

@@ -70,6 +70,53 @@ serving =
   )
 ```
 
+```elixir
+Kino.Text.new("Scribble Bird")
+livebook_dir = Path.absname(__DIR__)
+
+bird_file_input =
+  Kino.Input.text("Bird file path", default: livebook_dir <> "/scribble_bird.png")
+```
+
+```elixir
+bird_file = Kino.Input.read(bird_file_input)
+
+bird_image = StbImage.read_file!(bird_file) |> StbImage.to_nx()
+
+bird_image_tensor =
+  bird_image
+  |> Nx.reshape({512, 512, 3})
+  |> NxImage.to_continuous(0, 1)
+
+Kino.Image.new(bird_image)
+```
+
+```elixir
+bird_prompt = "a bird, high quality, detailed"
+bird_negative_prompt = "ugly, low quality, blurry"
+
+Kino.Layout.grid([
+  Kino.Text.new("prompt: " <> bird_prompt),
+  Kino.Text.new("negative prompt:" <> bird_negative_prompt)
+])
+```
+
+```elixir
+Kino.Text.new("Generate image ...")
+
+output =
+  Nx.Serving.run(serving, %{
+    prompt: bird_prompt,
+    negative_prompt: bird_negative_prompt,
+    controlnet_conditioning: bird_image_tensor
+  })
+
+for result <- output.results do
+  Kino.Image.new(result.image)
+end
+|> Kino.Layout.grid(columns: 2)
+```
+
 ## Your own input
 
 ```elixir