Remove logging functionality from app.py, streamline supported formats list, and enhance error handling in conversion functions.

Add logging functionality and configuration to app.py; update file handling and supported formats

Enhance type hinting in app.py for convert_local_file and convert_from_url functions

Remove titles from local file and URL document converter interfaces in app.py

Update README.md: Change emoji and color scheme, update app file path, and add server run instructions