Initial commit of docs2md project

[mjanez]

• Added pyproject.toml for project metadata and dependencies.
• Implemented core functionality in src/init.py for configuration loading.
• Created adjust_markdown.py as an entry point for markdown adjustments.
• Modularized adjustments into separate packages: adjustments, content_adjustments, and table_adjustments.
• Developed base utilities for markdown adjustments in base.py.
• Implemented specific content adjustments including header normalization and index text removal.
• Developed table adjustments for handling markdown table formatting issues.
• Created configuration management in config.py for robust settings handling.
• Established main entry point in main.py for document conversion and adjustment application.
• Added utility modules for logging and path management.