Nomad changes

docs/snippets/ruby/plugins/word_count_processor.md

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+```ruby title="Ruby"
+require 'kreuzberg'
+
+class WordCountProcessor
+  def call(result)
+    return result if result['content'].empty?
+    word_count = result['content'].split.length
+    result['metadata'] ||= {}
+    result['metadata']['word_count'] = word_count
+    result
+  end
+end
+
+processor = WordCountProcessor.new
+Kreuzberg.register_post_processor('word_count', processor, 10)
+
+config = Kreuzberg::ExtractionConfig.new(
+  postprocessor: { enabled: true }
+)
+
+result = Kreuzberg.extract_file_sync('document.pdf', config: config)
+puts "Words: #{result.metadata['word_count']}"
+```