feat: Create playlist downloader

[siavashyj]

YouTube Playlist Downloader

Description

This pull request introduces a new Python script that allows users to download information about playlists created by a YouTube account, including both private and public playlists. The script is located in the playlist-downloader directory of the repository.

Features

• Authenticates with the YouTube API using OAuth 2.0
• Retrieves all playlists (both public and private) from the authenticated account
• Downloads information about all videos in each playlist
• Saves playlist information to individual text files

Changes

• Added playlist-downloader/main.py as the main script
• Created playlist-downloader/pyproject.toml for dependency management and project configuration
• Added playlist-downloader/README.md with usage instructions and project information
• Included playlist-downloader/.pre-commit-config.yaml for code quality checks
• Included playlist-downloader/poetry.lock for dependency lock
• included playlist-downloader/requirements.txt for dependency install using pip

How to test

1. Clone the repository
2. Navigate to the playlist-downloader directory: cd playlist-downloader
3. Install dependencies using Poetry: poetry install
4. Set up YouTube API credentials and save as client_secrets.json in the playlist-downloader directory
5. Run the script: poetry run python main.py
6. Verify that playlist information is saved to text files in the playlist-downloader directory

Additional Notes

• This script requires users to set up their own YouTube API credentials
• Usage of this script should comply with YouTube's terms of service and API usage limits

Checklist

• Code follows the project's coding standards
• Documentation has been updated
• All tests pass
• No new warnings are generated

Please review and let me know if any changes are needed.