Nomad changes

docs/snippets/kotlin/config/keyword_extraction_config.md

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+```kotlin title="Kotlin"
+import dev.kreuzberg.*
+import java.nio.file.Paths
+import java.util.Optional
+
+fun main() {
+    val keywords = KeywordConfig.builder()
+        .withAlgorithm(KeywordAlgorithm.Yake)
+        .withMaxKeywords(10L)
+        .withMinScore(0.1f)
+        .withNgramRange(listOf(1L, 3L))
+        .withLanguage(Optional.of("en"))
+        .build()
+
+    val config = ExtractionConfig.builder()
+        .withKeywords(Optional.of(keywords))
+        .build()
+
+    val result = Kreuzberg.extractFileSync(Paths.get("document.pdf"), null, config)
+    println("Keywords: ${result.extractedKeywords()}")
+}
+```