Add Spaghetti Documentation

[dev-docs-github-app-dev]

This PR adds comprehensive documentation about spaghetti, providing a complete guide that covers various aspects of this popular pasta dish.

The new documentation includes:

• Historical background of spaghetti
• Basic ingredients and preparation methods
• Popular spaghetti dishes and variations
• Serving suggestions and accompaniments
• Nutritional information
• Storage guidelines

The content is structured in clear sections, making it easy for readers to find specific information about spaghetti preparation, variations, and best practices. This addition enriches our cuisine documentation with detailed information about one of the most beloved pasta dishes worldwide.

Location: /docs/cuisine/spaghetti.md

[dev-docs-github-app-dev]

This pull request was created by AI Agent. Please review the changes and provide feedback. Context used:

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