Replace Hyphenation menu with Typography menu.
This works mostly like before:
- typography/hyphenation is chosen according to the book
metadata language,
- one can set a default or a fallback language,
- hyphenation is now just a subset of typography, and
can be disabled while still setting a language and
enabling the other features,
- the typography language enables newly added features
to crengine: per-language line breaking rules and
per-language Harfbuzz glyph selection.
