Eric Huss d7892f5601 Add optional field for preprocessors ... This adds the `optional` field to the preprocessor configuration to mirror the same option for the `output` table. Missing preprocessors are now an error unless the `optional` field is set. This should help with inadvertently building a book when a missing preprocessor that you expect to be installed.		2025-08-16 13:39:54 -07:00
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src	Add optional field for preprocessors	2025-08-16 13:39:54 -07:00
book.toml	feat(html): cache bust static files by adding hashes to file names	2025-02-13 10:39:22 -07:00