Nomad changes

docs/snippets/rust/ocr/image_preprocessing.md

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+```rust title="Rust"
+use kreuzberg::{
+    extract_file_sync, ExtractionConfig, ImagePreprocessingConfig, OcrConfig, TesseractConfig,
+};
+
+fn main() -> kreuzberg::Result<()> {
+    let preprocessing = ImagePreprocessingConfig {
+        target_dpi: 300,
+        denoise: true,
+        deskew: true,
+        contrast_enhance: true,
+        binarization_method: "otsu".to_string(),
+        ..Default::default()
+    };
+
+    let config = ExtractionConfig {
+        ocr: Some(OcrConfig {
+            backend: "tesseract".to_string(),
+            language: "eng".to_string(),
+            tesseract_config: Some(TesseractConfig {
+                preprocessing: Some(preprocessing),
+                ..Default::default()
+            }),
+            ..Default::default()
+        }),
+        ..Default::default()
+    };
+
+    let result = extract_file_sync("document.pdf", None, &config)?;
+    println!("content length: {}", result.content.len());
+    Ok(())
+}
+```