Refactor barcode extraction and enhance PDF processing capabilities

- Added extract_barcodes_from_pdf function to read barcodes from PDF files using fitz.
- Updated read_datamatrix_zxing to return both the barcode text and its Base64 representation.
- Modified main execution block to include PDF barcode extraction.
- Improved image loading for better compatibility with zxing.
- Updated requirements.txt to include pymupdf for PDF processing.

build_pdf.py

@@ -407,8 +407,8 @@ if __name__ == "__main__":
     data = read_datamatrix_zxing(image_path)
     # Замените своими боевыми Base64 строками
     mock_base64_list = [
-        read_datamatrix_zxing(image_path),
-        read_datamatrix_zxing(image_path)
+        read_datamatrix_zxing(image_path)[1],
+        read_datamatrix_zxing(image_path)[1]
     ]
     
     process_batch(