chore: import upstream snapshot with attribution

examples/mcp/filesystem_example/sample_files/favorite_books.txt

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+1. To Kill a Mockingbird – Harper Lee
+2. Pride and Prejudice – Jane Austen
+3. 1984 – George Orwell
+4. The Hobbit – J.R.R. Tolkien
+5. Harry Potter and the Sorcerer’s Stone – J.K. Rowling
+6. The Great Gatsby – F. Scott Fitzgerald
+7. Charlotte’s Web – E.B. White
+8. Anne of Green Gables – Lucy Maud Montgomery
+9. The Alchemist – Paulo Coelho
+10. Little Women – Louisa May Alcott
+11. The Catcher in the Rye – J.D. Salinger
+12. Animal Farm – George Orwell
+13. The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe – C.S. Lewis
+14. The Book Thief – Markus Zusak
+15. A Wrinkle in Time – Madeleine L’Engle
+16. The Secret Garden – Frances Hodgson Burnett
+17. Moby-Dick – Herman Melville
+18. Fahrenheit 451 – Ray Bradbury
+19. Jane Eyre – Charlotte Brontë
+20. The Little Prince – Antoine de Saint-Exupéry

examples/mcp/filesystem_example/sample_files/favorite_cities.txt

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+- In the summer, I love visiting London.
+- In the winter, Tokyo is great.
+- In the spring, San Francisco.
+- In the fall, New York is the best.

examples/mcp/filesystem_example/sample_files/favorite_songs.txt

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+1. "Here Comes the Sun" – The Beatles
+2. "Imagine" – John Lennon
+3. "Bohemian Rhapsody" – Queen
+4. "Shake It Off" – Taylor Swift
+5. "Billie Jean" – Michael Jackson
+6. "Uptown Funk" – Mark Ronson ft.  Bruno Mars
+7. "Don’t Stop Believin’" – Journey
+8. "Dancing Queen" – ABBA
+9. "Happy" – Pharrell Williams
+10. "Wonderwall" – Oasis