Markdrop

Added
- Removed conflicts in apikeys setup

Added
- Fix MarkDropConfig
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Added
- Fix import issue of `Fitz` package

Added
- End-to-End pdf to markdown
- End-to-End pdf to html
- Generate descriptions of images and tables on the fly in a single traversal
- Added `Download table(s) as Excel` functionality

Added
- Fix `img_path` in `responder.py`
- Optimised `setup_keys` function
- Enhance and modified `analyze_pdf_images` function

Added
- Fix downloading pdfs from urls (in `make_markdown`).
- Added facility to analyze different types of image references (`XRef Id`)in a PDF from local file or URL
- Now, package supports genration of textual descriptions of image(s).
- ['qwen', 'gemini', 'openai', 'llama-vision', 'molmo', 'pixtral'] LLM Clients are supported for this conversion