Improved code structure and docstrings in utils/input.py, updated imports for clarity, and enhanced validation error handling. Added pylint to the dev dependency group in pyproject.toml for code quality checks. Removed unused imports from main.py.
Add main application logic, utility modules for stream and time handling, DRM key fetching, and manifest parsing. Includes example environment file, requirements, .gitignore, and README with project goals and todos.
