表格参数说明修改 (#16948)

* 表格参数说明修改

* 表格参数说明修改

* PaddleOCR-VL文档修改

* Enhance OCR.md with parameter explanations

Added detailed descriptions for various parameters related to device selection, inference settings, and performance optimizations in the OCR documentation.

* Update PP-ChatOCRv4.md

* Update PaddleOCR-VL documentation for save_to_json()

Clarify the behavior of save_to_json() method regarding output paths and numpy array conversion.

* Fix default value for layout_nms in documentation

Updated default initialization value for layout_nms parameter to True.

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Co-authored-by: cuicheng01 <45199522+cuicheng01@users.noreply.github.com>

Author: Luxorion-12