Add list of books to FAQ (#5404)

site/content/faq/250-are-there-any-books.md

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+question: Are there any books?
+---
+
+There are a few books:
+
+- [Svelte Handbook](https://flaviocopes.com/page/download-svelte-handbook/) by Flavio Copes
+- [Svelte 3 Up and Running](https://www.amazon.com/dp/B08D6T6BKS/) by Alessandro Segala
+- [Svelte and Sapper in Action](https://www.manning.com/books/svelte-and-sapper-in-action) by R. Mark Volkmann