- Reformatted the error message for database lock detection in main.py for better readability.
- Removed unnecessary imports from test_basic.py to streamline the test file.
- Updated .env.example with new Telegram API credentials and session string options.
- Expanded .gitignore to exclude session files and configuration.
- Refactored main.py to support string session authentication and added new functions for contact and message management.
- Updated README.md to reflect new features, installation instructions, and usage examples.
- Added python-dotenv as a dependency in pyproject.toml for environment variable management.
