8c3072c774
`VisibleTranslationState` was a wrapper around a `TranslationState` that was meant to public API consumers outside of this crate. However, the internal `TranslationState` and all its methods were still publicly exposed! This commit simplifies and remedies the situation by combining them into a single `TranslationState` type. Most of its methods are only `pub(crate)` now, not visible to the entire world. The only methods that are `pub` are the ones that `VisibleTranslationState` exposed.