Nomad changes

docs/snippets/python/plugins/extractor_registration.md

@@ -0,0 +1,14 @@
+```python title="Python"
+from kreuzberg import register_document_extractor
+
+class CustomExtractor:
+    def name(self) -> str:
+        return "custom"
+
+    def version(self) -> str:
+        return "1.0.0"
+
+extractor = CustomExtractor()
+register_document_extractor(extractor)
+print("Extractor registered")
+```