Nomad changes

docs/snippets/swift/plugins/clear_plugins.md

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+```swift title="Swift"
+import Kreuzberg
+
+// Clear all registered plugins in each registry
+try Kreuzberg.clearDocumentExtractors()
+try Kreuzberg.clearRenderers()
+try Kreuzberg.clearOcrBackends()
+try Kreuzberg.clearPostProcessors()
+try Kreuzberg.clearValidators()
+try Kreuzberg.clearEmbeddingBackends()
+
+print("All plugins cleared")
+```