Nomad changes

docs/snippets/csharp/extractor_registration.md

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+```csharp title="C#"
+using Kreuzberg;
+
+var extractor = new CustomExtractor();
+KreuzbergLib.RegisterDocumentExtractor(extractor);
+Console.WriteLine("Extractor registered");
+
+public class CustomExtractor : IDocumentExtractor
+{
+    public string Name() => "custom";
+    public string Version() => "1.0.0";
+
+    public Dictionary<string, object> ExtractBytes(byte[] data, string mimeType, Dictionary<string, object> config)
+    {
+        return new Dictionary<string, object>
+        {
+            { "content", "Extracted content" },
+            { "mime_type", mimeType }
+        };
+    }
+}
+```