docs: update README with model hub deployment steps and new env vars

docs: update README and .env.example with optional yt-dlp cookie authentication details

fix: update CORS origins and API key requirements in README for production guidelines

fix: update API endpoints in README for consistency and clarity

fix: update project structure in README to reflect accurate directory names and organization

feat: Enhance YouTube API integration with improved configuration checks and documentation

docs: Add Crown Commend API endpoints and environment variables to README

Update README.md to change color scheme from orange to red

Update README.md front matter for project metadata

Update README.md for deployment instructions and enhance project structure

Initial commit: CrownCode Backend for Hugging Face Spaces