Add support for bounding box extraction in images and LLM_PARSE via PaddleOCR

[dilithjay]

This PR adds support for

• PaddleOCR through STATIC_PARSE. This enables support for parsing images with STATIC_PARSE. However, note that the output from PaddleOCR does not get formatted as Markdown, only as plain text.
• Extracting bounding boxes for the output of LLM_PARSE.
• Auto-selection of the framework to use for bounding box detection
  • If an image is present in the PDF or if the input itself is an image, use PaddleOCR
  • Else, if the input is a PDF with only a text layer, use PDFPlumber
  • The auto-selection is necessary because PDFPlumber's coordinates are exact, but are not available if no text layer exists

TODO: Update documentation

[Copilot]

Pull Request Overview

This PR adds support for bounding box extraction and EasyOCR integration to enable parsing of images and PDFs with images. The primary goal is to extend the framework's capabilities to handle image-based documents while providing accurate bounding box coordinates for text elements.

• Adds EasyOCR dependency and parsing capability through STATIC_PARSE for image-based documents
• Implements automatic framework selection for bounding box detection based on document type
• Refactors bounding box functionality with improved fuzzy matching and bbox splitting for multi-word text

Reviewed Changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pyproject.toml	Adds easyocr dependency
lexoid/core/utils.py	Adds bbox routing logic, refactors edit distance function, and improves bounding box matching
lexoid/core/parse_type/static_parser.py	Implements EasyOCR parser and adds image parsing support
lexoid/core/conversion_utils.py	Refactors base64 conversion functions for better modularity
lexoid/api.py	Integrates bbox extraction with automatic framework selection

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[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 7 changed files in this pull request and generated 4 comments.

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_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}