Nomad changes

docs/snippets/csharp/image_preprocessing.md

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+```csharp title="C#"
+using Kreuzberg;
+
+var config = new ExtractionConfig
+{
+    Ocr = new OcrConfig
+    {
+        TesseractConfig = new TesseractConfig
+        {
+            Preprocessing = new ImagePreprocessingConfig
+            {
+                TargetDpi = 300,
+                Denoise = true,
+                Deskew = true,
+                ContrastEnhance = true,
+                BinarizationMethod = "otsu"
+            }
+        }
+    }
+};
+
+var result = await KreuzbergLib.ExtractFileAsync("scanned.pdf", config);
+Console.WriteLine($"Content: {result.Content[..Math.Min(100, result.Content.Length)]}");
+```