Add accelerate dependency to requirements.txt for improved performance

Remove thai-word-segmentation dependency from requirements.txt

Refactor Hugging Face integration to use HuggingFaceEndpoint; update requirements.txt for dependency alignment

Enhance README with supported tasks and schemas; update app.py for task templates and localization; modify requirements.txt for additional dependencies

Enhance README and app.py for PDF to QA dataset generation; add requirements.txt