Nomad changes

docs/snippets/elixir/advanced/keyword_extraction_example.exs

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+```elixir title="Elixir"
+alias Kreuzberg.ExtractionConfig
+
+# Extract keywords from document
+config = %ExtractionConfig{
+  keyword_extraction: %{
+    "enabled" => true,
+    "max_keywords" => 15
+  }
+}
+
+case Kreuzberg.extract_file("article.pdf", nil, config) do
+  {:ok, result} ->
+    IO.puts("=== Keyword Extraction ===\n")
+
+    # Display extracted keywords
+    if result.keywords do
+      IO.puts("Extracted keywords:")
+      Enum.each(result.keywords, fn kw ->
+        IO.puts("- #{kw["word"]}: #{kw["score"]}")
+      end)
+    else
+      IO.puts("No keywords extracted")
+    end
+
+  {:error, reason} ->
+    IO.puts("Extraction failed!")
+    IO.puts("Error: #{inspect(reason)}")
+end
+```