Nomad changes

docs/snippets/elixir/configuration/keyword_extraction_config.exs

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+```elixir title="Elixir"
+alias Kreuzberg.ExtractionConfig
+
+# Configure keyword extraction
+config = %ExtractionConfig{
+  keyword_extraction: %{
+    "enabled" => true,
+    "max_keywords" => 10,
+    "min_score" => 0.5
+  }
+}
+
+{:ok, result} = Kreuzberg.extract_file("document.pdf", nil, config)
+
+# Access extracted keywords
+if result.keywords do
+  IO.puts("Extracted #{length(result.keywords)} keywords")
+
+  Enum.each(result.keywords, fn keyword ->
+    IO.puts("#{keyword["text"]}: #{keyword["score"]}")
+  end)
+end
+```