Refactors book cover and metadata handling out of Epub class into a dedicated BookCoverUtils utility. Moves FootnoteEntry struct into reader activity directory. Simplifies cache clearing to use direct storage operations instead of Epub class.
## Summary
* Add swedish hyphenation using scripts/update_hypenation.sh
* Add hyphenation test data using the Swedish translation of Andy Weir's
Project Hail Mary
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### AI Usage
While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.
Did you use AI tools to help write this code? _**NO**_
## Summary
* Rename the hyphenation update script to match the documented
`update_hyphenation.sh` name.
* Update the hyphenation trie documentation command example to use the
renamed script.
## Additional Context
The prose in `docs/hyphenation-trie-format.md` referred to
`update_hyphenation.sh`, but the command example and file on disk used
`update_hypenation.sh`. This made the documented script name
inconsistent with the runnable command.
Verified with `rg` that no references to the misspelled script name
remain. Also ran `bash -n scripts/update_hyphenation.sh` to syntax-check
the renamed script without downloading trie files.
Justin Mitchell