support table structure model inference

[hongziqi]

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Motivation

The current table module in Mindocr only supports training and evaluation but lacks an inference script, limiting the ability to visualize inference results. For effective table structure recognition, integration with OCR output is typically required to generate accurate table outputs.Therefore, adding an inference script for table recognition is essential to enable visual verification and practical application of the module.

The key scripts required for this enhancement include:

1. predict_table_structure.py: for table structure recognition.
2. predict_table_recognition.py: to perform table recognition by combining recognized table structures with OCR results, enabling restoration into a CSV format.

Test Plan

1. test for table structure recognition
   python tools/infer/text/predict_table_structure.py --table_algorithm TABLE_MASTER --image_dir configs/table/example.png
   

2. test for table recognition
   python tools/infer/text/predict_table_recognition.py --det_algorithm DB_PPOCRv3 --rec_algorithm SVTR_PPOCRv3_CH --image_dir configs/table/example.png

• The table structure recognition results are identical to those shown above
• The OCR recognition results are as shown below
  
• By combining the results from both, the table recognition is restored into a CSV format as shown below.