GitLab

Adapt import statements in `pdf_parse_union_core_v2.py` to reflect the updated packagestructure, changing from the `magic_pdf.v3.helpers` module to the `magic_pdf.model.v3`
module. This ensures compatibility with the revised directory layout.

Implement a new function `draw_layout_sort_bbox` in `draw_bbox.py` to visualize the
layout sorting results using the `LayoutLMv3ForTokenClassification` model. This function
predicts the order of layout elements and draws them in the sorted sequence on the PDF pages.