Nomad changes

docs/snippets/csharp/pdf_config.md

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+```csharp title="C#"
+using Kreuzberg;
+
+var config = new ExtractionConfig
+{
+    PdfOptions = new PdfConfig
+    {
+        ExtractImages = true,
+        ExtractMetadata = true,
+        Passwords = new List<string> { "password1", "password2" },
+        Hierarchy = new HierarchyConfig
+        {
+            Enabled = true,
+            KClusters = 6,
+            IncludeBbox = true,
+            OcrCoverageThreshold = 0.5f
+        }
+    }
+};
+
+var result = await KreuzbergLib.ExtractFileAsync("document.pdf", config);
+Console.WriteLine($"Content: {result.Content[..Math.Min(100, result.Content.Length)]}");
+```